diff --git a/.github/workflows/conda/environment_macos_linux.yml b/.github/workflows/conda/environment_macos_linux.yml
index 34842449f..5d8e21c5e 100644
--- a/.github/workflows/conda/environment_macos_linux.yml
+++ b/.github/workflows/conda/environment_macos_linux.yml
@@ -10,3 +10,4 @@ dependencies:
   - ccache
   - cxx-compiler
   - ninja
+  - scipy
diff --git a/.github/workflows/conda/environment_windows.yml b/.github/workflows/conda/environment_windows.yml
index beb2be2af..af5e1c07a 100644
--- a/.github/workflows/conda/environment_windows.yml
+++ b/.github/workflows/conda/environment_windows.yml
@@ -9,3 +9,4 @@ dependencies:
   - boost
   - ccache
   - ninja
+  - scipy
diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 94d5cd074..48a8d17a2 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -16,7 +16,7 @@ jobs:
           submodules: 'true'
       - run: |
           sudo apt-get update
-          sudo apt-get install cmake libboost-all-dev libeigen3-dev python*-numpy python*-dev
+          sudo apt-get install cmake libboost-all-dev libeigen3-dev python*-numpy python*-dev python*-scipy
           echo $(sudo apt list --installed)
           echo $(g++ --version)
       - run: cmake -DPYTHON_EXECUTABLE=$(which python${{ matrix.python }}) .