diff --git a/dependencies.yaml b/dependencies.yaml
index 701aa5f7..640122b1 100644
--- a/dependencies.yaml
+++ b/dependencies.yaml
@@ -236,10 +236,6 @@ dependencies:
               py: "3.8"
             packages:
               - python=3.8
-          - matrix:
-              py: "3.9"
-            packages:
-              - python=3.9
           - matrix:
               py: "3.10"
             packages:
diff --git a/python/cucim/pyproject.toml b/python/cucim/pyproject.toml
index 2df37c5a..2945fbcd 100644
--- a/python/cucim/pyproject.toml
+++ b/python/cucim/pyproject.toml
@@ -22,7 +22,7 @@ authors = [
     { name = "NVIDIA Corporation" },
 ]
 license = { text = "Apache 2.0" }
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "click",
     "cupy-cuda11x>=12.0.0",
@@ -177,7 +177,7 @@ order-by-type = true
 
 [tool.black]
 line-length = 80
-target-version = ["py39"]
+target-version = ["py310"]
 include = '\.py?$'
 exclude = '''
 /(