diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..f891ab7
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,10 @@
+version: 2
+updates:
+  - package-ecosystem: "pip"
+    # Files stored in repository root
+    directory: "/"
+    schedule:
+      interval: "daily"
+      time: "08:00"
+    ignore:
+      - dependency-name: "torchmetrics"
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5ca71b8..e786fed 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.11", "3.12"]
         # https://docs.github.com/en/actions/using-github-hosted-runners/about-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
         platform: [ubuntu-latest, macos-13, windows-latest]
 
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index a04f6bd..a24652e 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10"]
+        python-version: ["3.11"]
         platform: [ubuntu-latest]
 
     steps:
diff --git a/pyproject.toml b/pyproject.toml
index 90c5343..2925fe1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ name = "microssim"
 dynamic = ["version"]
 description = "Improved structural similarity metrics for comparing microscopy data."
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 license = { text = "BSD-3-Clause" }
 authors = [
     { name = 'Ashesh' },
@@ -37,12 +37,12 @@ classifiers = [
     "Typing :: Typed",
 ]
 dependencies = [
-    "numpy<2",
-    "scipy",
-    "scikit-image",
-    "torch",
-    "torchmetrics",
-    "tqdm",
+    "numpy>=1.21,<3.0.0",
+    "scipy<=1.16.3",
+    "scikit-image<=0.25.2",
+    "torch<=2.9.1",
+    "torchmetrics<=1.8.2",
+    "tqdm<=4.67.1",
 ]
 
 [project.optional-dependencies]