diff --git a/.github/workflows/md5.yml b/.github/workflows/md5.yml
index 13ba82b..708519f 100644
--- a/.github/workflows/md5.yml
+++ b/.github/workflows/md5.yml
@@ -26,7 +26,7 @@ jobs:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            toolchain: 1.43.0 # MSRV
+            toolchain: 1.45.0 # MSRV
             deps: sudo apt update && sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
             toolchain: stable
@@ -34,7 +34,7 @@ jobs:
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            toolchain: 1.43.0 # MSRV
+            toolchain: 1.45.0 # MSRV
             deps: true
           - target: x86_64-unknown-linux-gnu
             toolchain: stable
diff --git a/.github/workflows/sha1.yml b/.github/workflows/sha1.yml
index 2c40988..210422b 100644
--- a/.github/workflows/sha1.yml
+++ b/.github/workflows/sha1.yml
@@ -26,7 +26,7 @@ jobs:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            rust: 1.43.0 # MSRV
+            rust: 1.45.0 # MSRV
             deps: sudo apt update && sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
             rust: stable
@@ -34,7 +34,7 @@ jobs:
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            rust: 1.43.0 # MSRV
+            rust: 1.45.0 # MSRV
           - target: x86_64-unknown-linux-gnu
             rust: stable
 
diff --git a/.github/workflows/sha2.yml b/.github/workflows/sha2.yml
index 80e89f3..045ca6c 100644
--- a/.github/workflows/sha2.yml
+++ b/.github/workflows/sha2.yml
@@ -26,7 +26,7 @@ jobs:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            rust: 1.43.0 # MSRV
+            rust: 1.45.0 # MSRV
             deps: sudo apt update && sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
             rust: stable
@@ -34,7 +34,7 @@ jobs:
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            rust: 1.43.0 # MSRV
+            rust: 1.45.0 # MSRV
           - target: x86_64-unknown-linux-gnu
             rust: stable
 
diff --git a/.github/workflows/whirlpool.yml b/.github/workflows/whirlpool.yml
index 6101a4f..4ad1595 100644
--- a/.github/workflows/whirlpool.yml
+++ b/.github/workflows/whirlpool.yml
@@ -26,7 +26,7 @@ jobs:
         include:
           # 32-bit Linux/x86
           - target: i686-unknown-linux-gnu
-            toolchain: 1.43.0 # MSRV
+            toolchain: 1.45.0 # MSRV
             deps: sudo apt update && sudo apt install gcc-multilib
           - target: i686-unknown-linux-gnu
             toolchain: stable
@@ -34,7 +34,7 @@ jobs:
 
           # 64-bit Linux/x86_64
           - target: x86_64-unknown-linux-gnu
-            toolchain: 1.43.0 # MSRV
+            toolchain: 1.45.0 # MSRV
             deps: true
           - target: x86_64-unknown-linux-gnu
             toolchain: stable