diff --git a/git-svn-migrate.sh b/git-svn-migrate.sh
index 1fd7a5f..389660a 100755
--- a/git-svn-migrate.sh
+++ b/git-svn-migrate.sh
@@ -167,8 +167,8 @@ fi
 # Process each URL in the repository list.
 pwd=`pwd`;
 tmp_destination="$pwd/tmp-git-repo";
-mkdir -p $destination;
-destination=`cd $destination; pwd`; #Absolute path.
+mkdir -p "$destination";
+destination=`cd "$destination"; pwd`; #Absolute path.
 
 # Ensure temporary repository location is empty.
 if [[ -e $tmp_destination ]]; then
@@ -191,38 +191,38 @@ do
   echo "Processing \"$name\" repository at $url..." >&2;
 
   # Init the final bare repository.
-  mkdir $destination/$name.git;
-  cd $destination/$name.git;
+  mkdir "$destination/$name.git";
+  cd "$destination/$name.git";
   git init --bare $gitinit_params;
   git symbolic-ref HEAD refs/heads/trunk;
 
   # Clone the original Subversion repository to a temp repository.
-  cd $pwd;
+  cd "$pwd";
   echo "- Cloning repository..." >&2;
-  git svn clone $url -A $authors_file --authors-prog=$dir/svn-lookup-author.sh --stdlayout --quiet $gitsvn_params $tmp_destination;
+  git svn clone "$url" -A "$authors_file" --authors-prog="$dir/svn-lookup-author.sh" --stdlayout --quiet $gitsvn_params "$tmp_destination";
 
   # Create .gitignore file.
   echo "- Converting svn:ignore properties into a .gitignore file..." >&2;
   if [[ $ignore_file != '' ]]; then
-    cp $ignore_file $tmp_destination/.gitignore;
+    cp "$ignore_file" "$tmp_destination/.gitignore";
   fi
-  cd $tmp_destination;
+  cd "$tmp_destination";
   git svn show-ignore --id trunk >> .gitignore;
   git add .gitignore;
   git commit --author="git-svn-migrate <nobody@example.org>" -m 'Convert svn:ignore properties to .gitignore.';
 
   # Push to final bare repository and remove temp repository.
   echo "- Pushing to new bare repository..." >&2;
-  git remote add bare $destination/$name.git;
+  git remote add bare "$destination/$name.git";
   git config remote.bare.push 'refs/remotes/*:refs/heads/*';
   git push bare;
   # Push the .gitignore commit that resides on master.
   git push bare master:trunk;
-  cd $pwd;
-  rm -r $tmp_destination;
+  cd "$pwd";
+  rm -r "$tmp_destination";
 
   # Rename Subversion's "trunk" branch to Git's standard "master" branch.
-  cd $destination/$name.git;
+  cd "$destination/$name.git";
   git branch -m trunk master;
 
   # Remove bogus branches of the form "name@REV".
@@ -242,4 +242,4 @@ do
   done
 
   echo "- Conversion completed at $(date)." >&2;
-done < $url_file
+done < "$url_file"