diff --git a/.github/workflows/rustls-rustcrypto.yml b/.github/workflows/rustls-rustcrypto.yml
index 37e374a..5286b92 100644
--- a/.github/workflows/rustls-rustcrypto.yml
+++ b/.github/workflows/rustls-rustcrypto.yml
@@ -23,7 +23,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.75.0
+          toolchain: 1.78.0
           components: clippy
       - run: cargo clippy --all --all-features -- -D warnings
 
@@ -51,7 +51,7 @@ jobs:
     strategy:
       matrix:
         rust:
-          - 1.75.0 # MSRV
+          - 1.78.0 # MSRV
           - stable
         target:
           - armv7a-none-eabi
@@ -69,7 +69,7 @@ jobs:
     strategy:
       matrix:
         toolchain:
-          - 1.75.0 # MSRV
+          - 1.78.0 # MSRV
           - stable
     runs-on: ubuntu-latest
     steps:
@@ -87,7 +87,7 @@ jobs:
       matrix:
         include:
           - target: powerpc-unknown-linux-gnu
-            rust: 1.75.0 # MSRV
+            rust: 1.78.0 # MSRV
           - target: powerpc-unknown-linux-gnu
             rust: stable
     runs-on: ubuntu-latest
diff --git a/Cargo.toml b/Cargo.toml
index 8b90856..7fd18bd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ repository = "https://github.com/RustCrypto/rustls-rustcrypto"
 categories = ["cryptography", "no-std"]
 keywords = ["rustls", "tls"]
 edition = "2021"
-rust-version = "1.75"
+rust-version = "1.78"
 
 # Ensure all dependencies + feats are mapped to crate features for correct usage
 # default features often have std breaking no_std and potentially other unwanted