diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 1e44ce5..c5b46a6 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -19,7 +19,7 @@ before_script:
 # Run tests
 test_build:
   stage: build
-  image: blockstream/satapi-builder@sha256:a3a137b80a08325bdd50a7c59ae0429b933e7a36db0d74f6ae34af067dfdee2d
+  image: blockstream/satapi-builder@sha256:a768bbd26e1b52dd681e122d35226943c043e9a35efeba45cea41a07d64357c4
   only:
     - branches@satellite/ionosphere
   except:
@@ -36,7 +36,7 @@ test_build:
 # Run tests and build docker images
 build:
   stage: build
-  image: blockstream/satapi-builder@sha256:a3a137b80a08325bdd50a7c59ae0429b933e7a36db0d74f6ae34af067dfdee2d
+  image: blockstream/satapi-builder@sha256:a768bbd26e1b52dd681e122d35226943c043e9a35efeba45cea41a07d64357c4
   only:
     - master@satellite/ionosphere
   before_script:
diff --git a/Dockerfile.ci b/Dockerfile.ci
index abe3ed4..fa6eeba 100644
--- a/Dockerfile.ci
+++ b/Dockerfile.ci
@@ -1,9 +1,11 @@
+# docker build --cache-from blockstream/satapi-builder@sha256:a3a137b80a08325bdd50a7c59ae0429b933e7a36db0d74f6ae34af067dfdee2d -f Dockerfile.ci .
+
 FROM docker@sha256:453c52a7a7200677f9effa3acc8498a2f71af77c2951ac5e1ac1391053573374 AS docker
 FROM alpine:latest
 
 COPY --from=docker /usr/local/bin/docker /usr/local/bin/docker
 
-RUN apk --no-cache add curl python py-crcmod bash libc6-compat openssh-client git gnupg
+RUN apk --no-cache add curl python python3 py-crcmod bash libc6-compat openssh-client git gnupg
 
 ENV RUBY_PACKAGES ruby ruby-io-console ruby-irb ruby-rake ruby-bundler ruby-bigdecimal ruby-json
 ENV RUBY_DEPS libstdc++ tzdata bash ca-certificates openssl sqlite sqlite-dev