diff --git a/languages/haskell/Dockerfile b/languages/haskell/Dockerfile
index ad6b169..6039727 100644
--- a/languages/haskell/Dockerfile
+++ b/languages/haskell/Dockerfile
@@ -1,14 +1,17 @@
-FROM debian:stretch
+FROM debian:stable-slim
 LABEL author="1Computer1"
 ENV LANG C.UTF-8
 
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends gnupg dirmngr && \
-    echo 'deb http://downloads.haskell.org/debian stretch main' > /etc/apt/sources.list.d/ghc.list && \
+    apt-get install -y --no-install-recommends gnupg dirmngr ca-certificates && \
+    echo 'deb https://downloads.haskell.org/debian stretch main' > /etc/apt/sources.list.d/ghc.list && \
     apt-key adv --keyserver keyserver.ubuntu.com --recv-keys BA3CBA3FFE22B574 && \
     apt-get update && \
-    apt-get install -y --no-install-recommends ghc-8.6.5
+    apt-get install -y --no-install-recommends ghc-9.0.1 && \
+    apt-get purge -y gnupg dirmngr ca-certificates && \
+    apt-get autoremove -y && \
+    apt-get autoclean -y
 
-ENV PATH /opt/ghc/8.6.5/bin:$PATH
+ENV PATH /opt/ghc/9.0.1/bin:$PATH
 
 COPY run.sh /var/run/