diff --git a/org.gnome.Geary.json b/org.gnome.Geary.json
index ce943f78..2d556511 100644
--- a/org.gnome.Geary.json
+++ b/org.gnome.Geary.json
@@ -207,7 +207,7 @@
                 {
                     "type": "git",
                     "url": "https://github.com/jstedfast/gmime.git",
-                    "branch": "3.2.7"
+                    "branch": "master"
                 }
             ]
         },
diff --git a/org.gnome.Geary.yaml b/org.gnome.Geary.yaml
index 7137349e..c3908a89 100644
--- a/org.gnome.Geary.yaml
+++ b/org.gnome.Geary.yaml
@@ -211,9 +211,7 @@ modules:
     sources:
       - type: git
         url: https://github.com/jstedfast/gmime.git
-        # Pin to 3.2.7 until 3.2.8 is released, or the mainline branch
-        # is pre-bumped to same.
-        branch: 3.2.7
+        branch: master
 
   # Geary dependency
   - name: libpeas