diff --git a/10/Dockerfile b/10/Dockerfile
index 8757104..5158723 100644
--- a/10/Dockerfile
+++ b/10/Dockerfile
@@ -7,5 +7,3 @@ ENV REFRESHED_AT $REFRESHED_AT
 RUN apk add --no-cache \
   git \
   openssh
-
-RUN npm install -g yarn
diff --git a/12/Dockerfile b/12/Dockerfile
index 5a5af03..195afbb 100644
--- a/12/Dockerfile
+++ b/12/Dockerfile
@@ -7,5 +7,3 @@ ENV REFRESHED_AT $REFRESHED_AT
 RUN apk add --no-cache \
   git \
   openssh
-
-RUN npm install -g yarn