diff --git a/.circleci/config.yml b/.circleci/config.yml
index fb3c81c..1b8526b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -34,7 +34,7 @@ jobs:
           command: |
             python -m pip install --upgrade pip
             python -m pip install setuptools==59.8.0 # Matplotlib 3.4
-            python -m pip install numpy==1.24
+            python -m pip install numpy==1.26.4
             python -m pip install pillow==9.0
             python -m pip install matplotlib==<< parameters.matplotlib-version >>
             python -m pip install pytest>=4.6
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 562d0d2..3069d6f 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -30,7 +30,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
 
-          python -m pip install numpy==1.24.4
+          python -m pip install numpy==1.26.4
           python -m pip install pillow==9.0
           python -m pip install matplotlib==${{ matrix.matplotlib-version }}
           python -m pip install pytest>=4.6