diff --git a/src/static/js/ChangesetUtils.js b/src/static/js/ChangesetUtils.js
index 15ce9c564..ef2be2ebe 100644
--- a/src/static/js/ChangesetUtils.js
+++ b/src/static/js/ChangesetUtils.js
@@ -20,7 +20,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-exports.buildRemoveRange = function (rep, builder, start, end) {
+exports.buildRemoveRange = (rep, builder, start, end) => {
   const startLineOffset = rep.lines.offsetOfIndex(start[0]);
   const endLineOffset = rep.lines.offsetOfIndex(end[0]);
 
@@ -32,7 +32,7 @@ exports.buildRemoveRange = function (rep, builder, start, end) {
   }
 };
 
-exports.buildKeepRange = function (rep, builder, start, end, attribs, pool) {
+exports.buildKeepRange = (rep, builder, start, end, attribs, pool) => {
   const startLineOffset = rep.lines.offsetOfIndex(start[0]);
   const endLineOffset = rep.lines.offsetOfIndex(end[0]);
 
@@ -44,7 +44,7 @@ exports.buildKeepRange = function (rep, builder, start, end, attribs, pool) {
   }
 };
 
-exports.buildKeepToStartOfRange = function (rep, builder, start) {
+exports.buildKeepToStartOfRange = (rep, builder, start) => {
   const startLineOffset = rep.lines.offsetOfIndex(start[0]);
 
   builder.keep(startLineOffset, start[0]);