diff --git a/resources/com/cadoles/tamarin/Dockerfile b/resources/com/cadoles/tamarin/Dockerfile
index 77fd2de..8822f4e 100644
--- a/resources/com/cadoles/tamarin/Dockerfile
+++ b/resources/com/cadoles/tamarin/Dockerfile
@@ -1,4 +1,4 @@
-FROM reg.cadoles.com/proxy_cache/library/alpine:3.12
+FROM reg.cadoles.com/proxy_cache/library/alpine:3.20
 
 ARG HTTP_PROXY=
 ARG HTTPS_PROXY=
@@ -11,7 +11,7 @@ RUN apk add --no-cache git docker python3 bash openssl curl
 
 RUN curl -k https://forge.cadoles.com/Cadoles/Jenkins/raw/branch/master/resources/com/cadoles/common/add-letsencrypt-ca.sh | bash
 
-RUN git clone http://forge.cadoles.com/Cadoles/Tamarin /tamarin\
+RUN git clone https://forge.cadoles.com/Cadoles/Tamarin /tamarin\
   && cd /tamarin\
   && git checkout ${TAMARIN_VERSION}