diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 1444ec7..a34b876 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -55,12 +55,13 @@ jobs:
       - name: Install dependencies
         run: |
           # Require cryptography >= 3.1 because in 3.0 and below, the backend param in load_key_and_certificates was still required.
-          pip3 install freezegun lxml pycryptodome rsa oscrypto "cryptography>=3.1"
+          # Require oscrypto > 1.3.0 because all versions until 1.3.0 had no (or broken) OpenSSL 3 support.
+          pip3 install freezegun lxml pycryptodome rsa "oscrypto>1.3.0" "cryptography>=3.1"
           # Install Python2 stuff
           curl https://bootstrap.pypa.io/pip/2.7/get-pip.py --output get-pip.py
           sudo apt install python2
           python2 get-pip.py
-          pip2 install freezegun mock lxml pycryptodome "rsa<=4.3" oscrypto cryptography==3.1
+          pip2 install freezegun mock lxml pycryptodome "rsa<=4.3" "oscrypto>1.3.0" cryptography==3.1
 
       - name: Run tests (Python 3)
         run: |