diff --git a/.travis.yml b/.travis.yml
index 95193b4..e9a2508 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ os:
 
 before_install:
   - sudo apt-get install -y libev-dev libssl-dev
-  - git clone https://github.com/zhaojh329/libuwsc.git
+  - git clone --recursive https://github.com/zhaojh329/libuwsc.git
   - cd libuwsc && cmake . && sudo make install && cd -
 
 script:
diff --git a/tools/install.sh b/tools/install.sh
index c42245c..f763766 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -99,7 +99,7 @@ rm -rf /tmp/rtty-build
 mkdir /tmp/rtty-build
 pushd /tmp/rtty-build
 
-git clone https://github.com/zhaojh329/libuwsc.git || {
+git clone --recursive https://github.com/zhaojh329/libuwsc.git || {
 	echo "Clone libuwsc failed"
 	exit 1
 }