diff --git a/tools/ci/images/unit_tests/Dockerfile b/tools/ci/images/unit_tests/Dockerfile
index 57f109b..1ade57d 100644
--- a/tools/ci/images/unit_tests/Dockerfile
+++ b/tools/ci/images/unit_tests/Dockerfile
@@ -34,8 +34,10 @@ RUN git clone 'https://git.light7734.com/light7734/light.git' --recursive \
     && conan install . \
         -s build_type=Debug \
         -c tools.system.package_manager:mode=install \
+        -c tools.cmake.cmaketoolchain:generator=Ninja \
         --build=missing \
     && conan install . \
         -s build_type=Release \
         -c tools.system.package_manager:mode=install \
+        -c tools.cmake.cmaketoolchain:generator=Ninja \
         --build=missing
diff --git a/tools/ci/images/valgrind/Dockerfile b/tools/ci/images/valgrind/Dockerfile
index a1c8589..551f9e9 100644
--- a/tools/ci/images/valgrind/Dockerfile
+++ b/tools/ci/images/valgrind/Dockerfile
@@ -34,8 +34,10 @@ RUN git clone 'https://git.light7734.com/light7734/light.git' --recursive \
     && conan install . \
         -s build_type=Debug \
         -c tools.system.package_manager:mode=install \
+        -c tools.cmake.cmaketoolchain:generator=Ninja \
         --build=missing \
     && conan install . \
         -s build_type=Release \
         -c tools.system.package_manager:mode=install \
+        -c tools.cmake.cmaketoolchain:generator=Ninja \
         --build=missing