diff --git a/.github/workflows/osx.yml b/.github/workflows/osx.yml
index 64a61bcf73..22d1241842 100644
--- a/.github/workflows/osx.yml
+++ b/.github/workflows/osx.yml
@@ -21,9 +21,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        brew install llvm@9
+        brew install llvm@11
         python -m pip install --upgrade pip
-        LLVM_CONFIG=/usr/local/Cellar/llvm@9/9.0.1_2/bin/llvm-config pip install llvmlite
+        LLVM_CONFIG=/usr/local/Cellar/llvm@11/11.1.0/bin/llvm-config pip install llvmlite
     - name: Install Mathics
       run: |
         make develop
diff --git a/setup.py b/setup.py
index 705c10796e..fe01264461 100644
--- a/setup.py
+++ b/setup.py
@@ -91,7 +91,7 @@ def read(*rnames):
 # General Requirements
 INSTALL_REQUIRES += [
     "Mathics_Scanner>=1.1.2,<1.2.0",
-    "sympy>=1.7, <= 1.8dev",
+    "sympy>=1.8, <= 1.9dev",
     "mpmath>=1.2.0",
     "numpy",
     "palettable",