diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e2a63500..84253658b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -63,7 +63,7 @@ jobs:
             pip \
             numpy nose coveralls pyyaml gsl fftw cmake swig scipy \
             compilers pkg-config setuptools_scm pytest pandas pytest-cov \
-            cython "camb>=1.3" isitgr traitlets fast-pt
+            cython "camb=1.3.6" isitgr traitlets fast-pt
 
           if [[ ${MATRIX_OS} == "macos-11" ]]; then
             mamba install llvm-openmp