diff --git a/requirements.txt b/requirements.txt
index 27b2d88f..1da90485 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ Pillow~=11.0.0; python_version >= "3.9"  # For Python >=3.9
 
 # Efficient image serialization
 numpy~=1.24.4; python_version < "3.9"   # For Python 3.8 max.
-numpy~=2.0.0; python_version == "3.9"  # For Python 3.9, only numpy 2.0.x is supported as 2.1 only supports Python >=3.10
+numpy~=2.2.1; python_version == "3.9"  # For Python 3.9, only numpy 2.0.x is supported as 2.1 only supports Python >=3.10
 numpy~=2.2; python_version >= "3.10"  # For Python >=3.10, any numpy 2.x is fine
 
 # For Nvidia GPU on all platforms