diff --git a/examples/harvest/Dockerfile b/examples/harvest/Dockerfile
index 49a345b..9ba0f86 100644
--- a/examples/harvest/Dockerfile
+++ b/examples/harvest/Dockerfile
@@ -1,7 +1,7 @@
 ###################
 ### Extensions ####
 ###################
-FROM ghcr.io/keitaroinc/ckan:2.9.1 as extbuild
+FROM ghcr.io/keitaroinc/ckan:2.9.2 as extbuild
 
 # Locations and tags, please use specific tags or revisions
 ENV HARVEST_GIT_URL=https://github.com/ckan/ckanext-harvest
@@ -28,7 +28,7 @@ USER ckan
 ############
 ### MAIN ###
 ############
-FROM ghcr.io/keitaroinc/ckan:2.9.1
+FROM ghcr.io/keitaroinc/ckan:2.9.2
 
 LABEL maintainer="Keitaro Inc <info@keitaro.com>"
 
diff --git a/images/ckan/2.7/Dockerfile b/images/ckan/2.7/Dockerfile
index 2ed123a..3435bc3 100644
--- a/images/ckan/2.7/Dockerfile
+++ b/images/ckan/2.7/Dockerfile
@@ -46,8 +46,8 @@ RUN apk add --no-cache --repository http://dl-cdn.alpinelinux.org/alpine/v3.6/ma
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build CKAN and requirements
 RUN pip install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan
@@ -87,8 +87,8 @@ RUN apk add --no-cache \
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py 
 
 # Fetch and build the default CKAN extensions
 RUN pip wheel --wheel-dir=/wheels git+${ENVVARS_GIT_URL}@${ENVVARS_GIT_BRANCH}#egg=ckanext-envvars
@@ -129,8 +129,8 @@ RUN apk add --no-cache \
     mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Get artifacts from build stages
 COPY --from=ckanbuild /wheels /srv/app/wheels
diff --git a/images/ckan/2.7/Dockerfile.focal b/images/ckan/2.7/Dockerfile.focal
index b496b21..d22a37f 100644
--- a/images/ckan/2.7/Dockerfile.focal
+++ b/images/ckan/2.7/Dockerfile.focal
@@ -71,8 +71,8 @@ RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build CKAN and requirements
 RUN pip install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan
@@ -114,8 +114,8 @@ RUN apt-get update && \
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build the default CKAN extensions
 RUN pip wheel --wheel-dir=/wheels git+${ENVVARS_GIT_URL}@${ENVVARS_GIT_BRANCH}#egg=ckanext-envvars
@@ -180,8 +180,8 @@ RUN apt-get update && \
     mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Get artifacts from build stages
 COPY --from=ckanbuild /wheels /srv/app/wheels
diff --git a/images/ckan/2.8/Dockerfile b/images/ckan/2.8/Dockerfile
index 3bdf6e0..281995d 100644
--- a/images/ckan/2.8/Dockerfile
+++ b/images/ckan/2.8/Dockerfile
@@ -42,8 +42,8 @@ RUN apk add --no-cache \
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build CKAN and requirements
 RUN pip install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan
@@ -83,8 +83,8 @@ RUN apk add --no-cache \
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build the default CKAN extensions
 RUN pip wheel --wheel-dir=/wheels git+${ENVVARS_GIT_URL}@${ENVVARS_GIT_BRANCH}#egg=ckanext-envvars
@@ -122,8 +122,8 @@ RUN apk add --no-cache git \
     mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Get artifacts from build stages
 COPY --from=ckanbuild /wheels /srv/app/wheels
diff --git a/images/ckan/2.8/Dockerfile.focal b/images/ckan/2.8/Dockerfile.focal
index ac4a0ba..37e5baa 100644
--- a/images/ckan/2.8/Dockerfile.focal
+++ b/images/ckan/2.8/Dockerfile.focal
@@ -63,8 +63,8 @@ RUN update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build CKAN and requirements
 RUN pip install -e git+${GIT_URL}@${GIT_BRANCH}#egg=ckan
@@ -106,8 +106,8 @@ RUN apt-get update && \
 RUN mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Fetch and build the default CKAN extensions
 RUN pip wheel --wheel-dir=/wheels git+${ENVVARS_GIT_URL}@${ENVVARS_GIT_BRANCH}#egg=ckanext-envvars
@@ -165,8 +165,8 @@ RUN apt-get update && \
     mkdir -p ${SRC_DIR}
 
 # Install pip
-RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/2.7/get-pip.py && \
-    python ${SRC_DIR}/get-pip.py 'pip==20.3.3'
+RUN curl -o ${SRC_DIR}/get-pip.py https://bootstrap.pypa.io/pip/2.7/get-pip.py && \
+    python ${SRC_DIR}/get-pip.py
 
 # Get artifacts from build stages
 COPY --from=ckanbuild /wheels /srv/app/wheels