diff --git a/.github/workflows/build-test b/.github/workflows/build-test
index d1147b3d..b189269c 100644
--- a/.github/workflows/build-test
+++ b/.github/workflows/build-test
@@ -61,5 +61,6 @@ fi
 
 if [[ "${MYPY}" = "mypy" ]]
 then
+    python -m pip install pytket
     ${GITHUB_WORKSPACE}/mypy-check ${GITHUB_WORKSPACE}
 fi
\ No newline at end of file