diff --git a/pyproject.toml b/pyproject.toml
index e804713a9..7cae09f7b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -29,7 +29,7 @@ Repository = "https://github.com/increase/increase-python"
 managed = true
 dev-dependencies = [
     "pyright==1.1.332",
-    "mypy==1.4.1",
+    "mypy==1.6.1",
     "black==23.3.0",
     "respx==0.19.2",
     "pytest==7.1.1",
diff --git a/requirements-dev.lock b/requirements-dev.lock
index 947bd0676..505b6ccf9 100644
--- a/requirements-dev.lock
+++ b/requirements-dev.lock
@@ -25,7 +25,7 @@ httpx==0.23.0
 idna==3.4
 iniconfig==2.0.0
 isort==5.10.1
-mypy==1.4.1
+mypy==1.6.1
 mypy-extensions==1.0.0
 nodeenv==1.8.0
 nox==2023.4.22