diff --git a/windows/src/developer/TIKE/project/Keyman.Developer.System.Project.ProjectFiles.pas b/windows/src/developer/TIKE/project/Keyman.Developer.System.Project.ProjectFiles.pas
index 3cd156149f..e17f366fb4 100644
--- a/windows/src/developer/TIKE/project/Keyman.Developer.System.Project.ProjectFiles.pas
+++ b/windows/src/developer/TIKE/project/Keyman.Developer.System.Project.ProjectFiles.pas
@@ -70,5 +70,6 @@ initialization
   RegisterProjectFileType('.htm', TOpenableProjectFile);   // I1769
   RegisterProjectFileType('.html', TOpenableProjectFile);  // I1769
   RegisterProjectFileType('.xml', TOpenableProjectFile);   // I1769
+  RegisterProjectFileType('.js', TOpenableProjectFile);
 end.
 
diff --git a/windows/src/developer/history.md b/windows/src/developer/history.md
index 7e73d9203e..a8aefc6d28 100644
--- a/windows/src/developer/history.md
+++ b/windows/src/developer/history.md
@@ -6,6 +6,7 @@
 ## 2019-9-27 12.0.39 beta
 * General: Introduces a Welcome screen and improves workflow for starting use of Keyman Developer (#2134)
 * General: Fix version numbers for kmlmc, kmlmp and kmlmi (#2129)
+* General: .js files now open in Keyman Developer for editing (#2140)
 
 ## 2019-09-25 12.0.37 beta
 * Compiler: Add -lexical-model command line option for building lexical model template projects to kmconvert. (#2120)