diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 2841dfd..8e63bce 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -12,6 +12,7 @@ updates:
   - package-ecosystem: "docker"
     directories:
       - "/docusaurus-docs"
+      - "/ferretdb-pngcrush"
       - "/ferretdb-prettier"
       - "/ferretdb-reprepro"
       - "/ferretdb-textlint"
diff --git a/ferretdb-pngcrush/Dockerfile b/ferretdb-pngcrush/Dockerfile
new file mode 100644
index 0000000..09f0023
--- /dev/null
+++ b/ferretdb-pngcrush/Dockerfile
@@ -0,0 +1,10 @@
+FROM alpine:3.18
+
+RUN apk update && \
+    apk add --no-cache pngcrush \
+    rm -rf /var/cache/apk/*
+
+WORKDIR /workdir
+
+ENTRYPOINT ["/usr/bin/pngcrush"]
+CMD ["-ow", "-brute", "-reduce", "-rem", "allb"]