diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 4bdd5285..bc95deb4 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v2
@@ -66,6 +66,7 @@ jobs:
           cd build
           WHEEL_PATH=$(ls smoldyn*.whl)
           python -m pip install --force-reinstall "${WHEEL_PATH}[biosimulators,biosimulators-tests]"
+
       - name: Test BioSimulators
         if: matrix.python-version >= '3.10'
         run: |
diff --git a/.github/workflows/osx.yml b/.github/workflows/osx.yml
index e67aac6a..8fce0d03 100644
--- a/.github/workflows/osx.yml
+++ b/.github/workflows/osx.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
 
     steps:
       - uses: actions/checkout@v2
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 28ac1eae..ef7796a2 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - uses: actions/checkout@v2
       - name: "Setup Python ${{ matrix.python-version }}"
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ba22ff4a..61e92b62 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,8 +17,8 @@ list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
 if(NOT SMOLDYN_VERSION)
     find_package(Git QUIET)
     if(GIT_FOUND)
-        # Is the current commit tagged? If yes, this command will return the
-        # tag else it returns empty. When a tag is found, it is a release.
+        # Is the current commit tagged? If yes, following command 
+        # will return the tag, empty otherwise.
         execute_process(COMMAND ${GIT_EXECUTABLE} tag --points-at HEAD
             WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
             OUTPUT_VARIABLE SMOLDYN_TAG
@@ -28,9 +28,9 @@ if(NOT SMOLDYN_VERSION)
             string(SUBSTRING ${SMOLDYN_TAG} 1 -1 SMOLDYN_VERSION)
             message(STATUS " -- Found a release tag ${SMOLDYN_TAG}")
         else()
-            # minute-ly release.
+            # hourly release.
             string(TIMESTAMP STAMP "%Y%m%d%H%M")
-            set(SMOLDYN_VERSION "2.75.dev${STAMP}")
+            set(SMOLDYN_VERSION "2.76.dev${STAMP}")
         endif()
     endif()
 endif()
diff --git a/scripts/Dockerfile-BioSimulators b/scripts/Dockerfile-BioSimulators
index 068bb0ae..3cbe3840 100644
--- a/scripts/Dockerfile-BioSimulators
+++ b/scripts/Dockerfile-BioSimulators
@@ -1,4 +1,4 @@
-FROM python:3.9-slim-bookworm
+FROM python:3.10-slim-bullseye
 
 ARG VERSION=""
 
@@ -14,7 +14,7 @@ LABEL \
     org.opencontainers.image.vendor="Steven Andrews" \
     org.opencontainers.image.licenses="LGPL-3.0-only" \
     \
-    base_image="python:3.9-slim-bookworm" \
+    base_image="python:3.10-slim-bullseye" \
     version="${VERSION}" \
     software="Smoldyn" \
     software.version="${VERSION}" \
@@ -44,6 +44,7 @@ ENV XVFB_RES="${RESOLUTION}" \
     XVFB_ARGS="${XARGS}"
 
 # install Smoldyn and its dependencies
+RUN ls -ltr
 COPY smoldyn*.whl /tmp/
 RUN cd /tmp \
     && WHEEL_PATH=$(ls -1 smoldyn*.whl | head -n 1) \
diff --git a/scripts/build_wheels_linux.sh b/scripts/build_wheels_linux.sh
index 96665f15..02ce657e 100755
--- a/scripts/build_wheels_linux.sh
+++ b/scripts/build_wheels_linux.sh
@@ -10,11 +10,9 @@ echo "Path to store wheels : $WHEELHOUSE"
 rm -rf "$WHEELHOUSE" && mkdir -p "$WHEELHOUSE"
 
 PYDIR310=/opt/python/cp310-cp310/
-PYDIR311=/opt/python/cp311-cp311/
-PYDIR312=/opt/python/cp312-cp312/
-PYDIR313=/opt/python/cp313-cp313/
 
-for PYDIR in $PYDIR313 $PYDIR312 $PYDIR311 $PYDIR310; do
+# all python3 version can use this wheel.
+for PYDIR in $PYDIR310; do
 	PYTHON=$PYDIR/bin/python
 
 	# dependencies
@@ -36,6 +34,8 @@ for PYDIR in $PYDIR313 $PYDIR312 $PYDIR311 $PYDIR310; do
 		make wheel
 		export PYTHONPATH="$(pwd)/py"
 		$PYTHON -m smoldyn "$SCRIPT_DIR/../examples/S4_molecules/mollist.txt"
+
+		$PYTHON -m auditwheel show *.whl
 		$PYTHON -m auditwheel repair *.whl -w "$WHEELHOUSE"
 
 		# install and test it
diff --git a/source/python/pyproject.toml.in b/source/python/pyproject.toml.in
index 1cb2cebe..d28c7ff5 100644
--- a/source/python/pyproject.toml.in
+++ b/source/python/pyproject.toml.in
@@ -2,7 +2,7 @@
 name = "smoldyn"
 version = "@SMOLDYN_VERSION@"
 readme = "../README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 authors = [
     {name = "Steve Andrews", email = "steve.andrews@epcc.ed.ac.uk"},
     {name = "Dilawar Singh", email = "dilawar.s.rajput@gmail.com"}