diff --git a/css/properties/display.json b/css/properties/display.json
index aa85eb722564a4..a384fd06e6a4ff 100644
--- a/css/properties/display.json
+++ b/css/properties/display.json
@@ -1228,7 +1228,7 @@
               },
               "chrome_android": "mirror",
               "edge": {
-                "version_added": "≤15"
+                "version_added": "12"
               },
               "firefox": {
                 "version_added": "1"
diff --git a/http/mixed-content.json b/http/mixed-content.json
index 1cf1ecef060c5a..66196b6338b393 100644
--- a/http/mixed-content.json
+++ b/http/mixed-content.json
@@ -10,12 +10,12 @@
         ],
         "support": {
           "chrome": {
-            "version_added": "≤79"
+            "version_added": "44"
           },
           "chrome_android": "mirror",
           "edge": "mirror",
           "firefox": {
-            "version_added": "≤23"
+            "version_added": "23"
           },
           "firefox_android": "mirror",
           "oculus": "mirror",
@@ -49,7 +49,7 @@
             "chrome_android": "mirror",
             "edge": "mirror",
             "firefox": {
-              "version_added": "≤23"
+              "version_added": "23"
             },
             "firefox_android": "mirror",
             "oculus": "mirror",
@@ -275,7 +275,7 @@
             "opera": "mirror",
             "opera_android": "mirror",
             "safari": {
-              "version_added": "≤9.1"
+              "version_added": "9"
             },
             "safari_ios": "mirror",
             "samsunginternet_android": "mirror",