diff --git a/docker/Dockerfile b/docker/Dockerfile
index d6c8ad3a..c684aa6b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -85,8 +85,8 @@ ONBUILD RUN \
             apk add --no-cache --virtual .build-librdkafka \
                 libressl3.3-libcrypto \
                 libressl3.3-libssl \
-                --repository=http://dl-cdn.alpinelinux.org/alpine/edge/main \
-                --repository=http://dl-cdn.alpinelinux.org/alpine/edge/community && \
+                --repository=http://dl-cdn.alpinelinux.org/alpine/v3.14/main \
+                --repository=http://dl-cdn.alpinelinux.org/alpine/v3.14/community && \
             # Install librdkafka from source code.
             apk add --no-cache curl bash && \
             curl https://codeload.github.com/edenhill/librdkafka/tar.gz/v1.6.0 | tar xzf - -C /tmp/ && \