diff --git a/24/alpine/Dockerfile b/24/alpine/Dockerfile
index 0009e04f..ea4bdce9 100644
--- a/24/alpine/Dockerfile
+++ b/24/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.20
 
 ENV OTP_VERSION="24.3.4.17" \
     REBAR3_VERSION="3.23.0"
diff --git a/25/alpine/Dockerfile b/25/alpine/Dockerfile
index b57ad1b7..5706f75b 100644
--- a/25/alpine/Dockerfile
+++ b/25/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.20
 
 ENV OTP_VERSION="25.3.2.16" \
     REBAR3_VERSION="3.24.0"
diff --git a/26/alpine/Dockerfile b/26/alpine/Dockerfile
index 55f1c7c0..05ec5ac2 100644
--- a/26/alpine/Dockerfile
+++ b/26/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.20
 
 ENV OTP_VERSION="26.2.5.6" \
     REBAR3_VERSION="3.24.0"
diff --git a/27/alpine/Dockerfile b/27/alpine/Dockerfile
index 584c1f9a..4a498b0a 100644
--- a/27/alpine/Dockerfile
+++ b/27/alpine/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.20
 
 ENV OTP_VERSION="27.2" \
     REBAR3_VERSION="3.24.0"