diff --git a/package.json b/package.json
index ea93c74..868805a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "bloompub-viewer",
-  "version": "1.0.10",
+  "version": "1.1.0",
   "author": "Bloom Devs",
   "description": "Viewer for Bloom Digital books",
   "license": "MIT",
@@ -47,6 +47,16 @@
           "ext": "bloomPUB",
           "name": "BloomPUB File",
           "role": "Viewer"
+        },
+        {
+          "ext": "bloom",
+          "name": "Bloom Source Book File",
+          "role": "Viewer"
+        },
+        {
+          "ext": "bloomSource",
+          "name": "Bloom Source Book File",
+          "role": "Viewer"
         }
       ]
     },
diff --git a/src/main/index.ts b/src/main/index.ts
index e812f06..2ee73f6 100644
--- a/src/main/index.ts
+++ b/src/main/index.ts
@@ -252,8 +252,10 @@ ipcMain.on("unpack-zip-file", (event, zipFilePath) => {
               zipFilePath.length
             );
             filename = bookTitle
-              .replace(/\.bloomd/gi, ".htm")
-              .replace(/\.bloompub/gi, ".htm");
+              .replace(/\.bloomd$/gi, ".htm")
+              .replace(/\.bloompub$/gi, ".htm")
+              .replace(/\.bloomsource$/gi, ".htm")
+              .replace(/\.bloom$/gi, ".htm");
             if (!fs.existsSync(Path.join(unpackedFolder, filename))) {
               // maybe it's the old format AND the user changed the name
               filename =
diff --git a/src/renderer/index.tsx b/src/renderer/index.tsx
index 37bd9fa..7715e83 100644
--- a/src/renderer/index.tsx
+++ b/src/renderer/index.tsx
@@ -110,6 +110,10 @@ export function showOpenFile() {
         name: "BloomPUB Book",
         extensions: ["bloomd", "bloompub"],
       },
+      {
+        name: "Bloom Source Book",
+        extensions: ["bloom", "bloomSource"],
+      },
     ],
   };
   window.electronApi.showOpenDialog(options, (filepath: string) => {