diff --git a/utils/update_checkout/update-checkout-config.json b/utils/update_checkout/update-checkout-config.json
index a9ae4074b17b3..3b631404dff99 100644
--- a/utils/update_checkout/update-checkout-config.json
+++ b/utils/update_checkout/update-checkout-config.json
@@ -78,7 +78,7 @@
                 "cmake": "v3.16.5",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "next" : {
@@ -108,7 +108,7 @@
                 "cmake": "v3.16.5",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
        "swift-3.0-branch" : {
@@ -128,7 +128,7 @@
                 "ninja": "release",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "swift-3.1-branch" : {
@@ -149,7 +149,7 @@
                 "ninja": "release",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "swift-4.0-branch" : {
@@ -170,7 +170,7 @@
                 "ninja": "release",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "swift-4.1-branch" : {
@@ -191,7 +191,7 @@
                 "ninja": "release",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "swift-4.2-branch" : {
@@ -212,7 +212,7 @@
                 "ninja": "release",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
         "swift-5.0-branch" : {
@@ -234,7 +234,7 @@
                 "icu": "release-61-1",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
        "swift-5.1-branch" : {
@@ -256,7 +256,7 @@
                 "icu": "release-61-1",
                 "indexstore-db": "swift-5.1-branch",
                 "sourcekit-lsp": "swift-5.1-branch",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
        "swift-5.2-branch": {
@@ -280,7 +280,7 @@
                 "cmake": "v3.15.1",
                 "indexstore-db": "swift-5.2-branch",
                 "sourcekit-lsp": "swift-5.2-branch",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
        "release/5.3": {
@@ -304,7 +304,7 @@
                 "cmake": "v3.16.5",
                 "indexstore-db": "release/5.3",
                 "sourcekit-lsp": "release/5.3",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         },
        "master-rebranch": {
@@ -331,7 +331,7 @@
                 "cmake": "v3.16.5",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
-                "swift-format": "master"
+                "swift-format": "main"
             }
         }
     }