diff --git a/browserstack.json b/browserstack.json
index 7818bff..c9934bc 100644
--- a/browserstack.json
+++ b/browserstack.json
@@ -3,6 +3,9 @@
 	"test_framework": "mocha",
 	"browsers": [
 		"chrome_latest",
+		"chrome_65",
+		"chrome_64",
+		"chrome_63",
 		"chrome_62",
 		"chrome_61",
 		"chrome_60",
@@ -21,6 +24,9 @@
 		"chrome_47",
 
 		"firefox_latest",
+		"firefox_59",
+		"firefox_58",
+		"firefox_57",
 		"firefox_56",
 		"firefox_55",
 		"firefox_54",
@@ -48,6 +54,9 @@
 		"edge_14",
 
 		"opera_latest",
+		"opera_52",
+		"opera_51",
+		"opera_50",
 		"opera_49",
 		"opera_48",
 		"opera_47",