diff --git a/api/CanvasGradient.json b/api/CanvasGradient.json
index 3ca0fa705603df..a36688fd7a0732 100644
--- a/api/CanvasGradient.json
+++ b/api/CanvasGradient.json
@@ -6,7 +6,7 @@
         "spec_url": "https://html.spec.whatwg.org/multipage/canvas.html#canvasgradient",
         "support": {
           "chrome": {
-            "version_added": "6"
+            "version_added": "1"
           },
           "chrome_android": "mirror",
           "edge": {
@@ -30,13 +30,11 @@
             "version_added": "10.1"
           },
           "safari": {
-            "version_added": "5.1"
+            "version_added": "2"
           },
           "safari_ios": "mirror",
           "samsunginternet_android": "mirror",
-          "webview_android": {
-            "version_added": "3"
-          }
+          "webview_android": "mirror"
         },
         "status": {
           "experimental": false,
@@ -50,7 +48,7 @@
           "spec_url": "https://html.spec.whatwg.org/multipage/canvas.html#dom-canvasgradient-addcolorstop-dev",
           "support": {
             "chrome": {
-              "version_added": "6"
+              "version_added": "1"
             },
             "chrome_android": "mirror",
             "edge": {
@@ -71,13 +69,11 @@
               "version_added": "10.1"
             },
             "safari": {
-              "version_added": "5.1"
+              "version_added": "2"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
-            "webview_android": {
-              "version_added": "3"
-            }
+            "webview_android": "mirror"
           },
           "status": {
             "experimental": false,
diff --git a/api/CanvasPattern.json b/api/CanvasPattern.json
index 6500857dbc3a48..b2dcc6867941ac 100644
--- a/api/CanvasPattern.json
+++ b/api/CanvasPattern.json
@@ -27,15 +27,11 @@
             "version_added": "10.1"
           },
           "safari": {
-            "version_added": "≤4"
-          },
-          "safari_ios": {
-            "version_added": "1"
+            "version_added": "2"
           },
+          "safari_ios": "mirror",
           "samsunginternet_android": "mirror",
-          "webview_android": {
-            "version_added": "≤37"
-          }
+          "webview_android": "mirror"
         },
         "status": {
           "experimental": false,