diff --git a/Dockerfile b/Dockerfile
index d9046f9..c097ca6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM zedeus/nitter:latest
+FROM zedeus/nitter:latest@sha256:27c22898444cd35287ef861b7feeee0975da293cc880e3ac3908ad4bc7f19936
 RUN apk --no-cache add gettext
 COPY entrypoint.sh nitter.example.conf /
 WORKDIR /src
diff --git a/compose.yml b/compose.yml
index 8faf6c7..dda7a0b 100644
--- a/compose.yml
+++ b/compose.yml
@@ -9,4 +9,4 @@ services:
       REDIS_PORT: "6379"
       REDIS_PASSWORD: ""
   redis:
-    image: redis:alpine
+    image: redis:alpine@sha256:5916c280afae05baf0dc9a0cc82fa8e51477bdbfc72f60a5c14fd2b7735bcf07