diff --git a/Dockerfile b/Dockerfile
index 020eaaac4..03143b84a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # ===================================
 # ===== Authelia official image =====
 # ===================================
-FROM alpine:3.15.2
+FROM alpine:3.15.3
 
 ARG TARGETOS
 ARG TARGETARCH
diff --git a/Dockerfile.coverage b/Dockerfile.coverage
index 3a2c10927..3c076fa51 100644
--- a/Dockerfile.coverage
+++ b/Dockerfile.coverage
@@ -46,7 +46,7 @@ CGO_ENABLED=1 CGO_CPPFLAGS="-D_FORTIFY_SOURCE=2 -fstack-protector-strong" CGO_LD
 # ===================================
 # ===== Authelia official image =====
 # ===================================
-FROM alpine:3.15.2
+FROM alpine:3.15.3
 
 RUN apk --no-cache add ca-certificates tzdata
 
diff --git a/Dockerfile.dev b/Dockerfile.dev
index 2c85cb028..9fc85d62f 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -43,7 +43,7 @@ CGO_ENABLED=1 CGO_CPPFLAGS="-D_FORTIFY_SOURCE=2 -fstack-protector-strong" CGO_LD
 # ===================================
 # ===== Authelia official image =====
 # ===================================
-FROM alpine:3.15.2
+FROM alpine:3.15.3
 
 WORKDIR /app
 
diff --git a/internal/suites/example/compose/kind/Dockerfile b/internal/suites/example/compose/kind/Dockerfile
index 75c49fa20..412b09eea 100644
--- a/internal/suites/example/compose/kind/Dockerfile
+++ b/internal/suites/example/compose/kind/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.15.2
+FROM alpine:3.15.3
 
 WORKDIR /kind
 
diff --git a/internal/suites/example/compose/samba/Dockerfile b/internal/suites/example/compose/samba/Dockerfile
index eb719e6ad..beb436dff 100644
--- a/internal/suites/example/compose/samba/Dockerfile
+++ b/internal/suites/example/compose/samba/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.15.2
+FROM alpine:3.15.3
 
 RUN \
 apk add --no-cache \