diff --git a/nvm-exec b/nvm-exec
index bec80c7..af0f0ad 100755
--- a/nvm-exec
+++ b/nvm-exec
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-DIR="$(dirname $(realpath "${BASH_SOURCE[0]}"))"
+DIR="$(dirname "$(realpath "${BASH_SOURCE[0]}")")"
 
 unset NVM_CD_FLAGS
 
diff --git a/nvm.sh b/nvm.sh
index 2573807..e85f75c 100755
--- a/nvm.sh
+++ b/nvm.sh
@@ -4078,7 +4078,7 @@ nvm() {
 
       NVM_EXEC="${NVM_DIR}/nvm-exec"
       if [ ! -f "${NVM_EXEC}" ]; then
-        NVM_EXEC=`dirname ${BASH_SOURCE[0]-}`/nvm-exec
+        NVM_EXEC="$(dirname "${BASH_SOURCE[0]-}")/nvm-exec"
       fi
       NODE_VERSION="${VERSION}" "${NVM_EXEC}" "$@"
     ;;