diff --git a/Dockerfile b/Dockerfile
index 3dae921..57a0b27 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -150,6 +150,10 @@ RUN apk add patch
 
 RUN apk add xxd
 
+## used mainly to sort semantic versions correctly
+RUN apk add npm && \
+    npm install -g semver
+
 ## Fixing Let's encrypt CA issue from 2021-10-01, probably can remove
 ## with newer alpine version (was added with alpine 3.7.1)
 RUN sed -ri 's%^(mozilla/DST_Root_CA_X3.crt)%!\\1%g' /etc/ca-certificates.conf && \