diff --git a/docker/tor-relay/Dockerfile b/docker/tor-relay/Dockerfile
index ab5daab..58ca82d 100644
--- a/docker/tor-relay/Dockerfile
+++ b/docker/tor-relay/Dockerfile
@@ -41,9 +41,9 @@ RUN wget https://www.openssl.org/source/openssl-1.1.1o.tar.gz && \
     cd ..
 
 # Compile zlib
-RUN wget http://zlib.net/zlib-1.2.11.tar.gz && \
-    tar xf zlib-1.2.11.tar.gz && \
-    cd zlib-1.2.11 && \
+RUN wget https://zlib.net/zlib-1.2.12.tar.gz && \
+    tar xf zlib-1.2.12.tar.gz && \
+    cd zlib-1.2.12 && \
     ./configure --static --prefix=/tmp/static_tor/install && \
     make -j4 && \
     make install && \