diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 47d6803..fed759a 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9, '3.10', '3.11']
+        python-version: [3.8, 3.9, '3.10', '3.11', '3.12']
     steps:
       - name: checkout
         uses: actions/checkout@v3
@@ -86,7 +86,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.7, 3.8, 3.9, '3.10', '3.11']
+        python-version: [3.8, 3.9, '3.10', '3.11', '3.12']
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - name: checkout
diff --git a/Cargo.toml b/Cargo.toml
index 52f8a00..79bfba9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ repository = "https://github.com/davesque/blake2b-py"
 description = "Blake2b hashing in Rust with Python bindings."
 
 [dependencies]
-pyo3 = { version = "~0.15", features = ["extension-module"] }
+pyo3 = { version = "~0.16", features = ["extension-module"] }
 
 [dev-dependencies]
 hex = "~0.4"