diff --git a/hipchat-post-receive b/hipchat-post-receive
index 209f2e6..bf9f52e 100755
--- a/hipchat-post-receive
+++ b/hipchat-post-receive
@@ -1,30 +1,30 @@
-#!/bin/sh
+#!/bin/bash
 
 # Read variables passed on by GIT
 read OLDREV NEWREV REFNAME
 
 # Find out basic variables
-GIT_EXEC=${GIT_EXEC:-`which git`}
-REPO=${REPO:-`basename $PWD`}
-HIPCHAT_COLOR=${HIPCHAT_COLOR:-"yellow"}
+GIT_EXEC="${GIT_EXEC:-$(which git)}"
+REPO="${REPO:-$(basename $PWD)}"
+HIPCHAT_COLOR="${HIPCHAT_COLOR:-'yellow'}"
 
 # User is commiter of either last or first commit
 NULLREV="0000000000000000000000000000000000000000"
-[ "$NEWREV" = "$NULLREV" ] && USER_REV="$OLDREV" || USER_REV="$NEWREV"
-USER=`$GIT_EXEC log -1 $USER_REV --format="%aN"`
-BRANCH=${REFNAME#refs/heads/}
+[[ "$NEWREV" == "$NULLREV" ]] && USER_REV="$OLDREV" || USER_REV="$NEWREV"
+USER=$($GIT_EXEC log -1 $USER_REV --format="%aN")
+BRANCH="${REFNAME#refs/heads/}"
 
 # Setup gitweb links
-if [ -n "$GITWEB" ]
+if [[ -n "$GITWEB" ]]
 then
-  USER_LINK="<a href=\"http://$GITWEB/?p=$REPO;a=search;s=$USER;st=author\">$USER</a>"
-  BRANCH_LINK="<a href=\"http://$GITWEB/?p=$REPO;a=shortlog;h=$REFNAME\">$BRANCH</a>"
-  REPO_LINK="<a href=\"http://$GITWEB/?p=$REPO;a=summary\">$REPO</a>"
-elif [ -n "$CGIT" ]
+  USER_LINK="<a href='http://$GITWEB/?p=$REPO;a=search;s=$USER;st=author'>$USER</a>"
+  BRANCH_LINK="<a href='http://$GITWEB/?p=$REPO;a=shortlog;h=$REFNAME'>$BRANCH</a>"
+  REPO_LINK="<a href='http://$GITWEB/?p=$REPO;a=summary'>$REPO</a>"
+elif [[ -n "$CGIT" ]]
 then
   USER_LINK=$USER
-  BRANCH_LINK="<a href=\"http://$CGIT/$REPO/log/?h=$REFNAME\">$BRANCH</a>"
-  REPO_LINK="<a href=\"http://$CGIT/$REPO/\">$REPO</a>"
+  BRANCH_LINK="<a href='http://$CGIT/$REPO/log/?h=$REFNAME'>$BRANCH</a>"
+  REPO_LINK="<a href='http://$CGIT/$REPO/'>$REPO</a>"
 else
   USER_LINK=$USER
   BRANCH_LINK=$BRANCH
@@ -32,43 +32,46 @@ else
 fi
 
 # Construct gitorious links
-if [ -n "$GITORIOUS" ]
+if [[ -n "$GITORIOUS" ]]
 then
-  REPO_NO_GIT=`echo -e $REPO|sed "s/.git//g"`
-  USER_LINK="<a href=\"https://$GITORIOUS/~$USER\">$USER</a>"
-  REPO_LINK="<a href=\"https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT\">$REPO</a>"
-  BRANCH_LINK="<a href=\"https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT/commits/$BRANCH\">$BRANCH</a>"
+  REPO_NO_GIT=$(echo -e $REPO|sed "s/.git//g")
+  USER_LINK="<a href='https://$GITORIOUS/~$USER'>$USER</a>"
+  REPO_LINK="<a href='https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT'>$REPO</a>"
+  BRANCH_LINK="<a href='https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT/commits/$BRANCH'>$BRANCH</a>"
 fi
 
 # Construct message
-if [ "$OLDREV" = "$NULLREV" ]
+if [[ "$OLDREV" == "$NULLREV" ]]
 then
   MSG="$USER_LINK created branch $BRANCH_LINK of $REPO_LINK"
   HIPCHAT_COLOR="green"
-elif [ "$NEWREV" = "$NULLREV" ]
+elif [[ "$NEWREV" == "$NULLREV" ]]
 then
   MSG="$USER_LINK deleted branch $BRANCH of $REPO_LINK"
   HIPCHAT_COLOR="red"
 else
   TITLE="$USER_LINK pushed to branch $BRANCH_LINK of $REPO_LINK"
-  if [ -n "$GITWEB" ]
+  if [[ -n "$GITWEB" ]]
   then
-    LOG=`$GIT_EXEC log $OLDREV..$NEWREV --format="- %s (<a href=\"http://$GITWEB/?p=$REPO;a=commitdiff;h=%H\">%h</a>)"`
-  elif [ -n "$CGIT" ]
+    FMT_STR="- %s (<a href='http://$GITWEB/?p=$REPO;a=commitdiff;h=%H'>%h</a>)"
+  elif [[ -n "$CGIT" ]]
   then
-    LOG=`$GIT_EXEC log $OLDREV..$NEWREV --format="- %s (<a href=\"http://$CGIT/$REPO/commit/?id=%H\">%h</a>)"`
+    FMT_STR="- %s (<a href='http://$CGIT/$REPO/commit/?id=%H'>%h</a>)"
   elif [ -n "$GITORIOUS" ]
   then
-    LOG=`$GIT_EXEC log $OLDREV..$NEWREV --format="- %s (<a href=\"https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT/commit/%H\">%h</a>)"`
+    FMT_STR="- %s (<a href='https://$GITORIOUS/$GIT_PROJECT/$REPO_NO_GIT/commit/%H'>%h</a>)"
   else
-    LOG=`$GIT_EXEC log $OLDREV..$NEWREV --format="- %s (%h)"`
+    FMT_STR="- %s (%h)"
   fi
-  if [ -n "$REDMINE" ]
+
+  LOG=$($GIT_EXEC log $OLDREV..$NEWREV --format="$FMT_STR")
+
+  if [[ -n "$REDMINE" ]]
   then
-    LOG=`echo -e "$LOG" | sed "s/#\([0-9]*\)/#<a href=\"http:\/\/$REDMINE\/issues\/\1\">\1<\/a>/g"`
+    LOG=$(echo -e "$LOG" | sed "s|#\([0-9]*\)|#<a href='http://$REDMINE/issues/\1'>\1</a>|g")
   elif [ -n "$JIRA" ]
   then
-    LOG=`echo -e "$LOG" | sed "s/\([A-Z]\{2,\}\-[0-9]\{1,\}\)/<a href=\"http:\/\/$JIRA\/browse\/\1\">\1<\/a>/g"`
+    LOG=$(echo -e "$LOG" | sed "s|\([A-Z]\{2,\}\-[0-9]\{1,\}\)|<a href='http://$JIRA/browse/\1'>\1</a>|g")
   fi
   MSG="$TITLE\n$LOG"
 fi