diff --git a/.github/workflows/Mac.yml b/.github/workflows/Mac.yml
index 996a29b56f8..75a8a6f540b 100644
--- a/.github/workflows/Mac.yml
+++ b/.github/workflows/Mac.yml
@@ -45,6 +45,7 @@ jobs:
       - name: Install gensim with conda
         shell: bash -l {0}
         run: |
+          conda install numpy=1.19.5
           conda install gensim=3.8.3
 
       - name: Install dependencies (Bash)
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 3e469e6fddf..93723499e8c 100755
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -51,6 +51,7 @@ jobs:
       - name: Install fbprophet with conda
         shell: bash -l {0}
         run: |
+          conda install numpy=1.19.5
           conda install -c conda-forge fbprophet=0.6
           conda install spyder
           conda install gensim=3.8.3