diff --git a/bionic/Dockerfile b/bionic/Dockerfile
index 1b67cf3..7eb60ce 100644
--- a/bionic/Dockerfile
+++ b/bionic/Dockerfile
@@ -18,8 +18,8 @@ RUN set -eux; \
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
     PATH=/usr/local/cargo/bin:$PATH \
-    RUSTUP_VERSION=1.24.2 \
-    RUSTUP_SHA256=6d6d0da8940357eeed733368a6a63fc96e8a1ed1e02fa4c4a60b64b6c66b6057 \
+    RUSTUP_VERSION=1.24.3 \
+    RUSTUP_SHA256=3dc5ef50861ee18657f9db2eeb7392f9c2a6c95c90ab41e45ab4ca71476b4338 \
     RUST_ARCH=x86_64-unknown-linux-gnu
 
 RUN set -eux; \
@@ -28,7 +28,7 @@ RUN set -eux; \
     echo "${RUSTUP_SHA256} *rustup-init" | sha256sum -c -; \
     chmod +x rustup-init
 
-ENV RUST_VERSION=1.51.0
+ENV RUST_VERSION=1.56.1
 
 RUN set -eux; \
     ./rustup-init -y --no-modify-path --default-toolchain $RUST_VERSION; \
diff --git a/centos-7/Dockerfile b/centos-7/Dockerfile
index 4b1fd6b..44692a6 100644
--- a/centos-7/Dockerfile
+++ b/centos-7/Dockerfile
@@ -11,8 +11,8 @@ RUN set -eux; \
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
     PATH=/usr/local/cargo/bin:$PATH \
-    RUSTUP_VERSION=1.24.2 \
-    RUSTUP_SHA256=6d6d0da8940357eeed733368a6a63fc96e8a1ed1e02fa4c4a60b64b6c66b6057 \
+    RUSTUP_VERSION=1.24.3 \
+    RUSTUP_SHA256=3dc5ef50861ee18657f9db2eeb7392f9c2a6c95c90ab41e45ab4ca71476b4338 \
     RUST_ARCH=x86_64-unknown-linux-gnu
 
 RUN set -eux; \
@@ -21,7 +21,7 @@ RUN set -eux; \
     echo "${RUSTUP_SHA256} *rustup-init" | sha256sum -c -; \
     chmod +x rustup-init
 
-ENV RUST_VERSION=1.51.0
+ENV RUST_VERSION=1.56.1
 
 RUN set -eux; \
     ./rustup-init -y --no-modify-path --default-toolchain $RUST_VERSION; \
diff --git a/gen-dockerfiles b/gen-dockerfiles
index ac03b06..e5aa0f8 100755
--- a/gen-dockerfiles
+++ b/gen-dockerfiles
@@ -3,8 +3,8 @@
 import os
 from urllib import request
 
-RUST_VERSION = '1.51.0'
-RUSTUP_VERSION = '1.24.2'
+RUST_VERSION = '1.56.1'
+RUSTUP_VERSION = '1.24.3'
 
 RUST_ARCH = 'x86_64-unknown-linux-gnu'