diff --git a/Dockerfile b/Dockerfile
index 220d4711dfd6256363cffe1b0a2c445a458b52fb..690f73bfc0259fd6e078c23bcfe17ba8bf4c1e83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM debian:9
+FROM debian:11
 
 RUN apt-get update \
   && apt-get install -y git subversion python build-essential gawk unzip libelf-dev libz-dev libncurses-dev libssl-dev time curl wget ecdsautils \