diff --git a/build/docker/old/ubuntu-disco/Dockerfile b/build/docker/old/ubuntu-disco/Dockerfile
index 2e802e5..37377e3 100644
--- a/build/docker/old/ubuntu-disco/Dockerfile
+++ b/build/docker/old/ubuntu-disco/Dockerfile
@@ -126,10 +126,10 @@
 
 RUN apt-get install -y --no-install-recommends \
       `# dotnet core dependencies` \
-      dotnet-sdk-6.0 \
-      dotnet-runtime-6.0 \
-      aspnetcore-runtime-6.0 \
-      dotnet-apphost-pack-6.0
+      dotnet-sdk-7.0 \
+      dotnet-runtime-7.0 \
+      aspnetcore-runtime-7.0 \
+      dotnet-apphost-pack-7.0
 
 RUN apt-get install -y --no-install-recommends \
       `# Erlang dependencies` \