diff --git a/.travis.yml b/.travis.yml
index b834af88..d3c8633c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -543,7 +543,7 @@ install:
   - git submodule init libs/utility
 
   - git submodule init tools/build
-  - git submodule update --depth 1
+  - git submodule update --depth 10
 
   - rm -rf libs/fusion
   - mv $TRAVIS_BUILD_DIR libs/fusion
diff --git a/appveyor.yml b/appveyor.yml
index ba83a8c1..86f751a8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -63,7 +63,7 @@ install:
   - git submodule init libs/utility
 
   - git submodule init tools/build
-  - git submodule update --depth 1
+  - git submodule update --depth 10
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\fusion
   - cmd /c bootstrap
   - b2 headers