diff --git a/ckan-2.10/base/Dockerfile b/ckan-2.10/base/Dockerfile
index 50aca05..1b4b9b4 100644
--- a/ckan-2.10/base/Dockerfile
+++ b/ckan-2.10/base/Dockerfile
@@ -77,7 +77,7 @@ RUN pip3 install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan && \
     cp who.ini ${APP_DIR} && \
     pip3 install --no-binary markdown -r requirements.txt && \
     # Install CKAN envvars to support loading config from environment variables
-    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git#egg=ckanext-envvars && \
+    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git@v0.0.6#egg=ckanext-envvars && \
     # Create and update CKAN config
     ckan generate config ${CKAN_INI} && \
     ckan config-tool ${CKAN_INI} "beaker.session.secret = " && \
diff --git a/ckan-2.10/base/Dockerfile.py3.10 b/ckan-2.10/base/Dockerfile.py3.10
index c8c5658..4ca48a6 100644
--- a/ckan-2.10/base/Dockerfile.py3.10
+++ b/ckan-2.10/base/Dockerfile.py3.10
@@ -63,7 +63,7 @@ RUN pip3 install -U pip && \
     cp who.ini ${APP_DIR} && \
     pip3 install --no-binary markdown -r requirements.txt && \
     # Install CKAN envvars to support loading config from environment variables
-    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git#egg=ckanext-envvars && \
+    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git@v0.0.6#egg=ckanext-envvars && \
     # Create and update CKAN config
     ckan generate config ${CKAN_INI} && \
     ckan config-tool ${CKAN_INI} "beaker.session.secret = " && \
diff --git a/ckan-2.11/base/Dockerfile b/ckan-2.11/base/Dockerfile
index a5fd3a0..5d41f7c 100644
--- a/ckan-2.11/base/Dockerfile
+++ b/ckan-2.11/base/Dockerfile
@@ -63,7 +63,7 @@ RUN pip3 install -U pip && \
     cp who.ini ${APP_DIR} && \
     pip3 install --no-binary markdown -r requirements.txt && \
     # Install CKAN envvars to support loading config from environment variables
-    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git#egg=ckanext-envvars && \
+    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git@v0.0.6#egg=ckanext-envvars && \
     # Create and update CKAN config
     ckan generate config ${CKAN_INI} && \
     ckan config-tool ${CKAN_INI} "SECRET_KEY = " && \
diff --git a/ckan-master/base/Dockerfile b/ckan-master/base/Dockerfile
index 40251fa..b7bcde3 100644
--- a/ckan-master/base/Dockerfile
+++ b/ckan-master/base/Dockerfile
@@ -62,7 +62,7 @@ RUN pip3 install -U pip && \
     cd ckan && \
     pip3 install --no-binary markdown -r requirements.txt && \
     # Install CKAN envvars to support loading config from environment variables
-    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git#egg=ckanext-envvars && \
+    pip3 install -e git+https://github.com/okfn/ckanext-envvars.git@v0.0.6#egg=ckanext-envvars && \
     # Create and update CKAN config
     ckan generate config ${CKAN_INI} && \
     ckan config-tool ${CKAN_INI} "SECRET_KEY = " && \