diff --git a/Makefile b/Makefile
index 889ec2d3f..00bdbab25 100644
--- a/Makefile
+++ b/Makefile
@@ -127,8 +127,8 @@ GO_SOURCES_OWN := $(filter-out vendor/% %/bindata.go, $(GO_SOURCES))
 #To update swagger use: GO111MODULE=on go get -u github.com/go-swagger/go-swagger/cmd/swagger
 SWAGGER := $(GO) run -mod=vendor github.com/go-swagger/go-swagger/cmd/swagger
 SWAGGER_SPEC := templates/swagger/v1_json.tmpl
-SWAGGER_SPEC_S_TMPL := s|"basePath": *"/api/v1"|"basePath": "{{AppSubUrl}}/api/v1"|g
-SWAGGER_SPEC_S_JSON := s|"basePath": *"{{AppSubUrl}}/api/v1"|"basePath": "/api/v1"|g
+SWAGGER_SPEC_S_TMPL := s|"basePath": *"/api/v1"|"basePath": "{{AppSubUrl \| JSEscape \| Safe}}/api/v1"|g
+SWAGGER_SPEC_S_JSON := s|"basePath": *"{{AppSubUrl \| JSEscape \| Safe}}/api/v1"|"basePath": "/api/v1"|g
 SWAGGER_EXCLUDE := code.gitea.io/sdk
 SWAGGER_NEWLINE_COMMAND := -e '$$a\'
 
diff --git a/modules/templates/helper.go b/modules/templates/helper.go
index ab66cc728..7e33f2620 100644
--- a/modules/templates/helper.go
+++ b/modules/templates/helper.go
@@ -92,6 +92,7 @@ func NewFuncMap() []template.FuncMap {
 		},
 		"Safe":          Safe,
 		"SafeJS":        SafeJS,
+		"JSEscape":      JSEscape,
 		"Str2html":      Str2html,
 		"TimeSince":     timeutil.TimeSince,
 		"TimeSinceUnix": timeutil.TimeSinceUnix,
@@ -629,6 +630,11 @@ func Escape(raw string) string {
 	return html.EscapeString(raw)
 }
 
+// JSEscape escapes a JS string
+func JSEscape(raw string) string {
+	return template.JSEscapeString(raw)
+}
+
 // List traversings the list
 func List(l *list.List) chan interface{} {
 	e := l.Front()
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 57bcdf49f..60c4f6d79 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -9,7 +9,7 @@
 //
 //     Schemes: http, https
 //     BasePath: /api/v1
-//     Version: {{AppVer}}
+//     Version: {{AppVer | JSEscape | Safe}}
 //     License: MIT http://opensource.org/licenses/MIT
 //
 //     Consumes:
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index 930af907e..d44583b81 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -19,9 +19,9 @@
       "name": "MIT",
       "url": "http://opensource.org/licenses/MIT"
     },
-    "version": "{{AppVer}}"
+    "version": "{{AppVer | JSEscape | Safe}}"
   },
-  "basePath": "{{AppSubUrl}}/api/v1",
+  "basePath": "{{AppSubUrl | JSEscape | Safe}}/api/v1",
   "paths": {
     "/admin/cron": {
       "get": {