diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 113a73c1999..dc2b8238851 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -91,7 +91,7 @@ jobs:
 
           # TODO: uv cannot install BoltzTraP2 (#3786),
           # suggesting no NumPy when there is
-          pip install BoltzTraP2 fdint
+          pip install BoltzTraP2
 
       - name: pytest split ${{ matrix.split }}
         run: |
diff --git a/pyproject.toml b/pyproject.toml
index f0704eb890e..6d4df081ab5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -100,7 +100,6 @@ optional = [
     # TODO: uv cannot install BoltzTraP2
     # "BoltzTraP2>=24.7.2 ; platform_system != 'Windows'",
     "chemview>=0.6",
-    "fdint>=2.0.2",
     "chgnet>=0.3.8",
     "f90nml>=1.1.2",
     "galore>=0.6.1",