diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2fa5fa1e..3d3ae93a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -175,7 +175,7 @@ jobs:
 
       - uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: "1.75"
+          toolchain: "1.80"
 
       - uses: Swatinem/rust-cache@v2
         with:
@@ -198,6 +198,9 @@ jobs:
       - run: cargo update -p zerofrom --precise 0.1.5
         working-directory: ./css-inline
 
+      - run: cargo update -p indexmap --precise 2.11.0
+        working-directory: ./css-inline
+
       - run: cargo build
         working-directory: ./css-inline
 
@@ -232,6 +235,8 @@ jobs:
             docker: ghcr.io/napi-rs/napi-rs/nodejs-rust:lts-debian
             build: |-
               set -e &&
+              rustup toolchain install 1.83 &&
+              rustup default 1.83 &&
               yarn build --target x86_64-unknown-linux-gnu &&
               strip *.node
           - host: ubuntu-22.04
@@ -243,6 +248,9 @@ jobs:
             docker: ghcr.io/napi-rs/napi-rs/nodejs-rust:lts-debian-aarch64
             build: |-
               set -e &&
+              rustup toolchain install 1.83 &&
+              rustup default 1.83 &&
+              rustup target add aarch64-unknown-linux-gnu &&
               yarn build --target aarch64-unknown-linux-gnu &&
               aarch64-unknown-linux-gnu-strip *.node
           - host: ubuntu-22.04
diff --git a/README.md b/README.md
index 633c5863..4b18784e 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ To include it in your project, add the following line to the dependencies sectio
 css-inline = "0.17"
 ```
 
-The Minimum Supported Rust Version is 1.75.
+The Minimum Supported Rust Version is 1.80.
 
 ## Usage
 
diff --git a/bindings/c/CHANGELOG.md b/bindings/c/CHANGELOG.md
index 0cf75d92..75288574 100644
--- a/bindings/c/CHANGELOG.md
+++ b/bindings/c/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 - `minify_css` option [#12](https://github.com/Stranger6667/css-inline/issues/12)
 
+### Changed
+
+- Bump MSRV to `1.80`.
+
 ## [0.17.0] - 2025-07-26
 
 ### Added