diff --git a/curl/Dockerfile b/curl/Dockerfile
index 502cf93c..8d801eca 100644
--- a/curl/Dockerfile
+++ b/curl/Dockerfile
@@ -1,5 +1,11 @@
 # Multi-stage build: First the full builder image:
 
+# define the liboqs tag to be used
+ARG LIBOQS_TAG=main
+
+# define the oqsprovider tag to be used
+ARG OQSPROVIDER_TAG=main
+
 # define the Curl version to be baked in
 ARG CURL_VERSION=7.81.0
 
@@ -21,6 +27,8 @@ ARG MAKE_DEFINES="-j 4"
 
 FROM alpine:3.11 as intermediate
 # Take in all global args
+ARG LIBOQS_TAG
+ARG OQSPROVIDER_TAG
 ARG CURL_VERSION
 ARG INSTALLDIR
 ARG LIBOQS_BUILD_DEFINES
@@ -43,9 +51,9 @@ RUN apk add build-base linux-headers \
 
 # get all sources
 WORKDIR /opt
-RUN git clone --depth 1 --branch main https://github.com/open-quantum-safe/liboqs && \
+RUN git clone --depth 1 --branch ${LIBOQS_TAG} https://github.com/open-quantum-safe/liboqs && \
     git clone --depth 1 --branch master https://github.com/openssl/openssl.git && \
-    git clone --depth 1 --branch main https://github.com/open-quantum-safe/oqs-provider.git && \
+    git clone --depth 1 --branch ${OQSPROVIDER_TAG} https://github.com/open-quantum-safe/oqs-provider.git && \
     wget https://curl.haxx.se/download/curl-${CURL_VERSION}.tar.gz && tar -zxvf curl-${CURL_VERSION}.tar.gz;
 
 # build liboqs
diff --git a/curl/README.md b/curl/README.md
index 8de1c60d..7eacae34 100644
--- a/curl/README.md
+++ b/curl/README.md
@@ -49,6 +49,15 @@ Information how to use the image is [available in the separate file USAGE.md](US
 
 The Dockerfile provided allows for significant customization of the image built:
 
+
+### LIBOQS_TAG
+
+Tag of `liboqs` release to be used. Default "main".
+
+### OQSPROVIDER_TAG
+
+Tag of `oqsprovider` release to be used. Default "main".
+
 ### LIBOQS_BUILD_DEFINES
 
 This permits changing the build options for the underlying library with the quantum safe algorithms. All possible options are documented [here](https://github.com/open-quantum-safe/liboqs/wiki/Customizing-liboqs).
@@ -67,7 +76,6 @@ This defines the quantum-safe cryptographic signature algorithm for the internal
 
 The default value is 'dilithium3' but can be set to any value documented [here](https://github.com/open-quantum-safe/oqs-provider#algorithms).
 
-
 ### INSTALL_PATH
 
 This defines the resultant location of the software installatiion.
diff --git a/httpd/Dockerfile b/httpd/Dockerfile
index 8b18588c..10d569a8 100644
--- a/httpd/Dockerfile
+++ b/httpd/Dockerfile
@@ -2,6 +2,12 @@
 
 # First: global build arguments: 
 
+# define the liboqs tag to be used
+ARG LIBOQS_TAG=main
+
+# define the oqsprovider tag to be used
+ARG OQSPROVIDER_TAG=main
+
 # liboqs build type variant; maximum portability of image:
 ARG LIBOQS_BUILD_DEFINES="-DOQS_DIST_BUILD=ON"
 
@@ -35,6 +41,8 @@ FROM alpine:3.13 as intermediate
 # ToDo: Upgrade possible if https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.14.0#faccessat2 addressed
 
 # Take in global args
+ARG LIBOQS_TAG
+ARG OQSPROVIDER_TAG
 ARG LIBOQS_BUILD_DEFINES
 ARG OPENSSL_PATH
 ARG HTTPD_PATH
@@ -55,9 +63,9 @@ RUN apk add build-base linux-headers \
 
 # get sources
 WORKDIR /opt
-RUN git clone --depth 1 --branch main https://github.com/open-quantum-safe/liboqs && \
+RUN git clone --depth 1 --branch ${LIBOQS_TAG} https://github.com/open-quantum-safe/liboqs && \
     git clone --depth 1 --branch master https://github.com/openssl/openssl ossl-src && \
-    git clone --depth 1 --branch main https://github.com/open-quantum-safe/oqs-provider && \
+    git clone --depth 1 --branch ${OQSPROVIDER_TAG} https://github.com/open-quantum-safe/oqs-provider && \
     wget ${APR_MIRROR}/apr/apr-${APR_VERSION}.tar.gz && tar xzvf apr-${APR_VERSION}.tar.gz && \
     wget ${APR_MIRROR}/apr/apr-util-${APRU_VERSION}.tar.gz && tar xzvf apr-util-${APRU_VERSION}.tar.gz && \
     wget --trust-server-names "https://archive.apache.org/dist/httpd/httpd-${HTTPD_VERSION}.tar.gz" && tar -zxvf httpd-${HTTPD_VERSION}.tar.gz;
diff --git a/httpd/README.md b/httpd/README.md
index 819e6173..3851d1ed 100644
--- a/httpd/README.md
+++ b/httpd/README.md
@@ -20,6 +20,14 @@ Complete information how to use the image is [available in the separate file USA
 
 The Dockerfile provided allows for significant customization of the image built:
 
+### LIBOQS_TAG
+
+Tag of `liboqs` release to be used. Default "main".
+
+### OQSPROVIDER_TAG
+
+Tag of `oqsprovider` release to be used. Default "main".
+
 ### LIBOQS_BUILD_DEFINES
 
 This permits changing the build options for the underlying library with the quantum safe algorithms. All possible options are documented [here](https://github.com/open-quantum-safe/liboqs/wiki/Customizing-liboqs).
diff --git a/nginx/Dockerfile b/nginx/Dockerfile
index 7b91ce2c..b9c53f4a 100644
--- a/nginx/Dockerfile
+++ b/nginx/Dockerfile
@@ -2,6 +2,12 @@
 
 # First: global build arguments:
 
+# define the liboqs tag to be used
+ARG LIBOQS_TAG=main
+
+# define the oqsprovider tag to be used
+ARG OQSPROVIDER_TAG=main
+
 # liboqs build type variant; maximum portability of image:
 ARG LIBOQS_BUILD_DEFINES="-DOQS_DIST_BUILD=ON"
 
@@ -27,6 +33,8 @@ ARG MAKE_DEFINES="-j 18"
 FROM alpine:3.13 as intermediate
 # ToDo: Upgrade possible if https://wiki.alpinelinux.org/wiki/Release_Notes_for_Alpine_3.14.0#faccessat2 addressed
 # Take in global args
+ARG LIBOQS_TAG
+ARG OQSPROVIDER_TAG
 ARG BASEDIR
 ARG LIBOQS_BUILD_DEFINES
 ARG INSTALLDIR
@@ -46,8 +54,8 @@ RUN apk add build-base linux-headers \
 
 # get OQS sources
 WORKDIR /opt
-RUN git clone --depth 1 --branch main https://github.com/open-quantum-safe/liboqs && \
-    git clone --depth 1 --branch main https://github.com/open-quantum-safe/oqs-provider.git && \
+RUN git clone --depth 1 --branch ${LIBOQS_TAG} https://github.com/open-quantum-safe/liboqs && \
+    git clone --depth 1 --branch ${OQSPROVIDER_TAG} https://github.com/open-quantum-safe/oqs-provider.git && \
     git clone --depth 1 --branch master https://github.com/openssl/openssl.git && \
     wget nginx.org/download/nginx-${NGINX_VERSION}.tar.gz && tar -zxvf nginx-${NGINX_VERSION}.tar.gz;
 
diff --git a/nginx/README.md b/nginx/README.md
index 241ec3bf..ccca0a6f 100644
--- a/nginx/README.md
+++ b/nginx/README.md
@@ -17,6 +17,14 @@ Complete information how to use the image is [available in the separate file USA
 
 The Dockerfile provided allows for significant customization of the image built:
 
+### LIBOQS_TAG
+
+Tag of `liboqs` release to be used. Default "main".
+
+### OQSPROVIDER_TAG
+
+Tag of `oqsprovider` release to be used. Default "main".
+
 ### LIBOQS_BUILD_DEFINES
 
 This permits changing the build options for the underlying library with the quantum safe algorithms. All possible options are documented [here](https://github.com/open-quantum-safe/liboqs/wiki/Customizing-liboqs).