diff --git a/docker/develop/Dockerfile b/docker/develop/Dockerfile
index ca2a5b17d..6df7b9795 100644
--- a/docker/develop/Dockerfile
+++ b/docker/develop/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:2.4.4-slim-stretch
+FROM ruby:2.6-slim-buster
 
 RUN DEBIAN_FRONTEND=noninteractive \
     apt-get update && \
@@ -27,7 +27,8 @@ ARG DIA_UID
 ARG DIA_GID
 
 ENV HOME="/home/diaspora" \
-    GEM_HOME="/diaspora/vendor/bundle"
+    GEM_HOME="/diaspora/vendor/bundle" \
+    OPENSSL_CONF="/etc/ssl/"
 
 RUN addgroup --gid $DIA_GID diaspora && \
     adduser \