diff --git a/install.sh b/install.sh
index 68485f2..588e874 100755
--- a/install.sh
+++ b/install.sh
@@ -43,15 +43,13 @@ cat ./src/main/stage1.sns.sh                    >> "$S"
 cat ./src/main/stage2.sns.sh                    >> "$S"
 cat ./src/main/stage3.sns.sh                    >> "$S"
 
-chmod u+x "$S"
+chmod +x "$S"
 # Install SNS
-if [ ! -r "/bin/sns" ] || [ grep "Simple Note System" < "/bin/sns" ];
-  sudo cp "$S" > "/bin/sns"
+if [ ! -r "/bin/sns" ]; then
+  sudo cp "$S" "/bin/sns"
 fi
 # Install Bash completion
-if [ ! -r "/usr/share/bash-completion/completions/sns" ]\
- || [ grep "Simple Note System" < "/usr/share/bash-completion/completions/sns" ]; then
-   sudo cp "src/bash-completion/sns" >\
-    "/usr/share/bash-completion/completions/sns"
+if [ ! -r "/usr/share/bash-completion/completions/sns" ]; then
+   sudo cp "src/bash-completion/sns" "/usr/share/bash-completion/completions/sns"
 fi
 exit