diff --git a/Dockerfile b/Dockerfile
index 96253bd..76da4d2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,25 @@
-FROM ubuntu:22.04
+FROM debian:trixie-slim
 
 ENV LANG=C.UTF-8 \
     DEBIAN_FRONTEND=noninteractive \
-    DATADIRS="/coindata"
+    DATADIRS="/coindata" \
+    VIRTUAL_ENV=/opt/venv
 
 RUN apt-get update; \
     apt-get install -y --no-install-recommends \
-        python3-pip libpython3-dev gnupg pkg-config gcc libc-dev gosu tzdata cmake ninja-build;
+        python3-pip libpython3-dev python3-venv gnupg pkg-config gcc libc-dev gosu tzdata cmake ninja-build;
+
+# Create python venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 
 # Install requirements first so as to skip in subsequent rebuilds
 COPY ./requirements.txt requirements.txt
-RUN pip3 install -r requirements.txt --require-hashes
+RUN pip install -r requirements.txt --require-hashes
 
 COPY . basicswap-master
 RUN cd basicswap-master; \
-    pip3 install .;
+    pip install .;
 
 RUN useradd -ms /bin/bash swap_user && \
     mkdir /coindata && chown swap_user -R /coindata
diff --git a/basicswap/basicswap.py b/basicswap/basicswap.py
index 737dca0..ac35f8d 100644
--- a/basicswap/basicswap.py
+++ b/basicswap/basicswap.py
@@ -3611,6 +3611,16 @@ class BasicSwap(BaseApp, BSXNetwork, UIApp):
                 raise ValueError(
                     f"Invalid swap type for: {coin_from.name} -> {coin_to.name}"
                 )
+            strict_swap_type: bool = self.settings.get(
+                "strict_swap_type", False if self.chain == "regtest" else True
+            )
+            if strict_swap_type and (
+                coin_from not in self.coins_without_segwit
+                or coin_to not in self.coins_without_segwit
+            ):
+                raise ValueError(
+                    f"Coin pair should use adaptor sig swap type: {coin_from.name} -> {coin_to.name}"
+                )
 
     def _process_notification_safe(self, event_type, event_data) -> None:
         try:
diff --git a/doc/release-notes.md b/doc/release-notes.md
index 980c46e..51c19d2 100644
--- a/doc/release-notes.md
+++ b/doc/release-notes.md
@@ -1,3 +1,12 @@
+
+0.16.5
+==============
+
+- Updated docker base images to Debian Trixie.
+- By default reject secret hash type offers where the coin pair could use adaptor sig swap.
+  - override with "strict_swap_type" setting.
+
+
 0.16.4
 ==============
 
diff --git a/docker/production/bitcoin/Dockerfile b/docker/production/bitcoin/Dockerfile
index 52b02f7..fdabba7 100644
--- a/docker/production/bitcoin/Dockerfile
+++ b/docker/production/bitcoin/Dockerfile
@@ -5,7 +5,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=bitcoin --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV BITCOIN_DATA /data
diff --git a/docker/production/bitcoincash/Dockerfile b/docker/production/bitcoincash/Dockerfile
index 8004e36..c56fd9a 100644
--- a/docker/production/bitcoincash/Dockerfile
+++ b/docker/production/bitcoincash/Dockerfile
@@ -5,7 +5,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=bitcoincash --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV BITCOINCASH_DATA /data
diff --git a/docker/production/dash/Dockerfile b/docker/production/dash/Dockerfile
index de8713c..dda2b63 100644
--- a/docker/production/dash/Dockerfile
+++ b/docker/production/dash/Dockerfile
@@ -5,7 +5,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=dash --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV DASH_DATA /data
diff --git a/docker/production/decred_daemon/Dockerfile b/docker/production/decred_daemon/Dockerfile
index f15237a..aecc75e 100644
--- a/docker/production/decred_daemon/Dockerfile
+++ b/docker/production/decred_daemon/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=decred --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV DCR_DATA /data
diff --git a/docker/production/dogecoin/Dockerfile b/docker/production/dogecoin/Dockerfile
index 4630e69..1ed2dde 100644
--- a/docker/production/dogecoin/Dockerfile
+++ b/docker/production/dogecoin/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=dogecoin --withoutcoin=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV DOGECOIN_DATA /data
diff --git a/docker/production/firo/Dockerfile b/docker/production/firo/Dockerfile
index b245a89..fbc651c 100644
--- a/docker/production/firo/Dockerfile
+++ b/docker/production/firo/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=firo --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV FIRO_DATA /data
diff --git a/docker/production/litecoin/Dockerfile b/docker/production/litecoin/Dockerfile
index fc0cba2..598e9e3 100644
--- a/docker/production/litecoin/Dockerfile
+++ b/docker/production/litecoin/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=litecoin --withoutcoin=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV LITECOIN_DATA /data
diff --git a/docker/production/monero_daemon/Dockerfile b/docker/production/monero_daemon/Dockerfile
index c470e8e..dc860a5 100644
--- a/docker/production/monero_daemon/Dockerfile
+++ b/docker/production/monero_daemon/Dockerfile
@@ -2,7 +2,7 @@ FROM i_swapclient as install_stage
 
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=monero --withoutcoins=particl
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 
 COPY --from=install_stage /coin_bin .
 
diff --git a/docker/production/particl/Dockerfile b/docker/production/particl/Dockerfile
index 63441f8..098cee5 100644
--- a/docker/production/particl/Dockerfile
+++ b/docker/production/particl/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV PARTICL_DATA /data
diff --git a/docker/production/pivx/Dockerfile b/docker/production/pivx/Dockerfile
index 6e16d79..b75656c 100644
--- a/docker/production/pivx/Dockerfile
+++ b/docker/production/pivx/Dockerfile
@@ -3,7 +3,7 @@ FROM i_swapclient as install_stage
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=pivx --withoutcoins=particl && \
     find /coin_bin -name *.tar.gz -delete
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 COPY --from=install_stage /coin_bin .
 
 ENV PIVX_DATA /data
diff --git a/docker/production/swapclient/Dockerfile b/docker/production/swapclient/Dockerfile
index 0a069ef..075fece 100644
--- a/docker/production/swapclient/Dockerfile
+++ b/docker/production/swapclient/Dockerfile
@@ -1,12 +1,17 @@
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 
 ENV LANG=C.UTF-8 \
     DEBIAN_FRONTEND=noninteractive \
-    DATADIR=/data
+    DATADIR=/data \
+    VIRTUAL_ENV=/opt/venv
 
 RUN apt-get update; \
     apt-get install -y --no-install-recommends \
-        python3-pip libpython3-dev gnupg pkg-config gcc libc-dev gosu tzdata wget unzip cmake ninja-build;
+        python3-pip libpython3-dev python3-venv gnupg pkg-config gcc libc-dev gosu tzdata wget unzip cmake ninja-build;
+
+# Create python venv
+RUN python3 -m venv $VIRTUAL_ENV
+ENV PATH="$VIRTUAL_ENV/bin:$PATH"
 
 ARG BASICSWAP_URL=https://github.com/basicswap/basicswap/archive/master.zip
 ARG BASICSWAP_DIR=basicswap-master
diff --git a/docker/production/wownero_daemon/Dockerfile b/docker/production/wownero_daemon/Dockerfile
index c857e78..3210676 100644
--- a/docker/production/wownero_daemon/Dockerfile
+++ b/docker/production/wownero_daemon/Dockerfile
@@ -2,7 +2,7 @@ FROM i_swapclient as install_stage
 
 RUN basicswap-prepare --preparebinonly --bindir=/coin_bin --withcoin=wownero --withoutcoins=particl
 
-FROM debian:bullseye-slim
+FROM debian:trixie-slim
 
 COPY --from=install_stage /coin_bin .
 
diff --git a/pyproject.toml b/pyproject.toml
index 0ead5d6..bf68f09 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ dev = [
     "pre-commit",
     "pytest",
     "ruff",
-    "black==26.3.1",
+    "black==26.5.1",
     "selenium",
 ]
 
diff --git a/tests/basicswap/test_other.py b/tests/basicswap/test_other.py
index 2782b1c..c992642 100644
--- a/tests/basicswap/test_other.py
+++ b/tests/basicswap/test_other.py
@@ -8,6 +8,7 @@
 
 import hashlib
 import logging
+import os
 import random
 import secrets
 import threading
@@ -22,10 +23,15 @@ from coincurve.ecdsaotves import (
 )
 from coincurve.keys import PrivateKey
 
+from basicswap.basicswap import (
+    Coins,
+    BasicSwap,
+    SwapTypes,
+)
 from basicswap.contrib.mnemonic import Mnemonic
 from basicswap.db import create_db_, DBMethods, KnownIdentity
 from basicswap.util import h2b
-from basicswap.util.address import decodeAddress
+from basicswap.util.address import decodeAddress, toWIF
 from basicswap.util.crypto import ripemd160, hash160, blake256
 from basicswap.util.extkey import ExtKeyPair
 from basicswap.util.integer import encode_varint, decode_varint
@@ -60,6 +66,9 @@ from basicswap.contrib.test_framework.messages import (
     CTxOut,
     uint256_from_str,
 )
+from tests.basicswap.common import (
+    PREFIX_SECRET_KEY_REGTEST,
+)
 
 logger = logging.getLogger()
 
@@ -790,6 +799,74 @@ class Test(unittest.TestCase):
             == "252cd6e85b99e0fd554c44d5fe638923f7ef563048362406a665cf3400feb1bd"
         )
 
+    def test_validateSwapType(self):
+        logging.info("---------- Test validateSwapType")
+        basicswap_dir = "/tmp/bsx_test_other"
+        if not os.path.exists(basicswap_dir):
+            os.makedirs(basicswap_dir)
+
+        k = PrivateKey()
+        settings = {
+            "network_key": toWIF(PREFIX_SECRET_KEY_REGTEST, k.secret),
+            "network_pubkey": k.public_key.format().hex(),
+        }
+
+        sc = BasicSwap(
+            basicswap_dir,
+            settings,
+            "regtest",
+            log_name="bsx_test_other",
+        )
+
+        should_pass = [
+            (Coins.BTC, Coins.XMR, SwapTypes.XMR_SWAP),
+            (Coins.XMR, Coins.BTC, SwapTypes.XMR_SWAP),
+            (Coins.BTC, Coins.FIRO, SwapTypes.XMR_SWAP),
+            (Coins.FIRO, Coins.BTC, SwapTypes.XMR_SWAP),
+            (Coins.PIVX, Coins.BTC, SwapTypes.SELLER_FIRST),
+            (Coins.BTC, Coins.PIVX, SwapTypes.SELLER_FIRST),
+            (Coins.DASH, Coins.PIVX, SwapTypes.SELLER_FIRST),
+            (Coins.PIVX, Coins.DASH, SwapTypes.SELLER_FIRST),
+        ]
+        should_fail = [
+            (Coins.BTC, Coins.XMR, SwapTypes.SELLER_FIRST),
+            (Coins.XMR, Coins.PART_ANON, SwapTypes.XMR_SWAP),
+            (Coins.FIRO, Coins.PART_ANON, SwapTypes.XMR_SWAP),
+            (Coins.PART_ANON, Coins.FIRO, SwapTypes.XMR_SWAP),
+            (Coins.FIRO, Coins.BTC, SwapTypes.SELLER_FIRST),
+            (Coins.BTC, Coins.FIRO, SwapTypes.SELLER_FIRST),
+        ]
+
+        for case in should_pass:
+            sc.validateSwapType(case[0], case[1], case[2])
+        for case in should_fail:
+            self.assertRaises(
+                ValueError, sc.validateSwapType, case[0], case[1], case[2]
+            )
+        sc.chain = "mainnet"
+        for case in should_pass:
+            try:
+                sc.validateSwapType(case[0], case[1], case[2])
+            except Exception as e:
+                assert "Coin pair should use adaptor sig swap type" in str(e)
+            else:
+                if case[2] != SwapTypes.XMR_SWAP:
+                    if (
+                        case[0] not in sc.coins_without_segwit
+                        or case[1] not in sc.coins_without_segwit
+                    ):
+                        raise ValueError(f"Invalid swap pair in strict mode {case}")
+        for case in should_fail:
+            self.assertRaises(
+                ValueError, sc.validateSwapType, case[0], case[1], case[2]
+            )
+
+        sc.settings["strict_swap_type"] = False
+        for case in should_pass:
+            sc.validateSwapType(case[0], case[1], case[2])
+
+        del sc
+
 
 if __name__ == "__main__":
     unittest.main()
diff --git a/tests/basicswap/test_run.py b/tests/basicswap/test_run.py
index a6266f4..f67ae06 100644
--- a/tests/basicswap/test_run.py
+++ b/tests/basicswap/test_run.py
@@ -159,35 +159,6 @@ class Test(BaseTest):
         rv = read_json_api(1800, "rateslist?from=PART&to=BTC")
         assert len(rv) == 1
 
-    def test_004_validateSwapType(self):
-        logging.info("---------- Test validateSwapType")
-
-        sc = self.swap_clients[0]
-
-        should_pass = [
-            (Coins.BTC, Coins.XMR, SwapTypes.XMR_SWAP),
-            (Coins.XMR, Coins.BTC, SwapTypes.XMR_SWAP),
-            (Coins.BTC, Coins.FIRO, SwapTypes.XMR_SWAP),
-            (Coins.FIRO, Coins.BTC, SwapTypes.XMR_SWAP),
-            (Coins.PIVX, Coins.BTC, SwapTypes.SELLER_FIRST),
-            (Coins.BTC, Coins.PIVX, SwapTypes.SELLER_FIRST),
-        ]
-        should_fail = [
-            (Coins.BTC, Coins.XMR, SwapTypes.SELLER_FIRST),
-            (Coins.XMR, Coins.PART_ANON, SwapTypes.XMR_SWAP),
-            (Coins.FIRO, Coins.PART_ANON, SwapTypes.XMR_SWAP),
-            (Coins.PART_ANON, Coins.FIRO, SwapTypes.XMR_SWAP),
-            (Coins.FIRO, Coins.BTC, SwapTypes.SELLER_FIRST),
-            (Coins.BTC, Coins.FIRO, SwapTypes.SELLER_FIRST),
-        ]
-
-        for case in should_pass:
-            sc.validateSwapType(case[0], case[1], case[2])
-        for case in should_fail:
-            self.assertRaises(
-                ValueError, sc.validateSwapType, case[0], case[1], case[2]
-            )
-
     def test_003_cltv(self):
         test_coin_from = Coins.PART
         logging.info("---------- Test {} cltv".format(test_coin_from.name))
diff --git a/tests/basicswap/test_xmr.py b/tests/basicswap/test_xmr.py
index 271ceb8..15f8c41 100644
--- a/tests/basicswap/test_xmr.py
+++ b/tests/basicswap/test_xmr.py
@@ -38,9 +38,7 @@ from basicswap.basicswap_util import (
     EventLogTypes,
 )
 from basicswap.util import COIN, format_amount, make_int, TemporaryError
-from basicswap.util.address import (
-    toWIF,
-)
+from basicswap.util.address import toWIF
 from basicswap.rpc import (
     callrpc,
 )