diff --git a/.travis.yml b/.travis.yml
index f5409798d0baed1d518ff8c85c84fcad0d0fa701..1f8ff5ff8c62a24bb3daa005446a74c1a018454e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,8 +14,11 @@ addons:
       - python
       - python-pip
       - python2.7-dev
+      - go
 before_install:
   -  pip install virtualenv pre-commit
+install:
+  -  GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
 script:
   - travis/precommit.sh
 notifications:
diff --git a/pre-commit-hooks/convert_markdown_into_ipynb.sh b/pre-commit-hooks/convert_markdown_into_ipynb.sh
index d2bffa875648a62df5392d842d64cc3037bfd5e4..c3613b212531e4606e7dd331f92afa7c5a5cd1bb 100755
--- a/pre-commit-hooks/convert_markdown_into_ipynb.sh
+++ b/pre-commit-hooks/convert_markdown_into_ipynb.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 command -v go >/dev/null 2>&1
-if [[ $? != 0 ]]; then
+if [ $? -ne 0 ]; then
     echo >&2 "Please install https://golang.org/doc/install#install"
     exit 1
 fi
@@ -10,7 +10,7 @@ GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
 
 for file in $@ ; do
 	/tmp/go/bin/markdown-to-ipynb < $file > ${file%.*}".ipynb"
-    if [[ $? != 0 ]]; then
+    if [ $? -ne 0 ]; then
         echo >&2 "markdown-to-ipynb $file error"
         exit 1
     fi
diff --git a/tools/convert-markdown-into-ipynb-and-test.sh b/tools/convert-markdown-into-ipynb-and-test.sh
index 0d662f9130f33b79d51f569ff435360bd224a456..b51dfb54ea164eb4037646abba8de6a8683cb702 100755
--- a/tools/convert-markdown-into-ipynb-and-test.sh
+++ b/tools/convert-markdown-into-ipynb-and-test.sh
@@ -1,11 +1,11 @@
 #!/bin/sh
 command -v go >/dev/null 2>&1
-if [[ $? != 0 ]]; then
+if [ $? -ne 0 ]; then
     echo >&2 "Please install go https://golang.org/doc/install#install"
     exit 1
 fi
 
-GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
+#GOPATH=/tmp/go go get -u github.com/wangkuiyi/ipynb/markdown-to-ipynb
 
 cur_path=$(dirname $(readlink -f $0))
 cd $cur_path/../
@@ -13,7 +13,7 @@ cd $cur_path/../
 #convert md to ipynb
 for file in */{README,README\.en}.md ; do
     /tmp/go/bin/markdown-to-ipynb < $file > ${file%.*}".ipynb"
-    if [[ $? != 0 ]]; then
+    if [ $? -ne 0 ]; then
         echo >&2 "markdown-to-ipynb $file error"
         exit 1
     fi