diff --git a/.editorconfig b/.editorconfig
index c0946ac997..e23e4cd649 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -17,6 +17,7 @@ insert_final_newline = false
 
 [templates/swagger/v1_json.tmpl]
 indent_style = space
+insert_final_newline = false
 
 [templates/user/auth/oidc_wellknown.tmpl]
 indent_style = space
diff --git a/.github/workflows/files-changed.yml b/.github/workflows/files-changed.yml
index 7c1fb02442..b3ee93e6f8 100644
--- a/.github/workflows/files-changed.yml
+++ b/.github/workflows/files-changed.yml
@@ -85,6 +85,7 @@ jobs:
 
             swagger:
               - "templates/swagger/v1_json.tmpl"
+              - "templates/swagger/v1_input.json"
               - "Makefile"
               - "package.json"
               - "package-lock.json"
diff --git a/Makefile b/Makefile
index 89a6f1261f..e38fb801c3 100644
--- a/Makefile
+++ b/Makefile
@@ -165,10 +165,8 @@ ifdef DEPS_PLAYWRIGHT
 endif
 
 SWAGGER_SPEC := templates/swagger/v1_json.tmpl
-SWAGGER_SPEC_S_TMPL := s|"basePath": *"/api/v1"|"basePath": "{{AppSubUrl \| JSEscape}}/api/v1"|g
-SWAGGER_SPEC_S_JSON := s|"basePath": *"{{AppSubUrl \| JSEscape}}/api/v1"|"basePath": "/api/v1"|g
+SWAGGER_SPEC_INPUT := templates/swagger/v1_input.json
 SWAGGER_EXCLUDE := code.gitea.io/sdk
-SWAGGER_NEWLINE_COMMAND := -e '$$a\'
 
 TEST_MYSQL_HOST ?= mysql:3306
 TEST_MYSQL_DBNAME ?= testgitea
@@ -271,10 +269,8 @@ endif
 .PHONY: generate-swagger
 generate-swagger: $(SWAGGER_SPEC) ## generate the swagger spec from code comments
 
-$(SWAGGER_SPEC): $(GO_SOURCES_NO_BINDATA)
-	$(GO) run $(SWAGGER_PACKAGE) generate spec -x "$(SWAGGER_EXCLUDE)" -o './$(SWAGGER_SPEC)'
-	$(SED_INPLACE) '$(SWAGGER_SPEC_S_TMPL)' './$(SWAGGER_SPEC)'
-	$(SED_INPLACE) $(SWAGGER_NEWLINE_COMMAND) './$(SWAGGER_SPEC)'
+$(SWAGGER_SPEC): $(GO_SOURCES_NO_BINDATA) $(SWAGGER_SPEC_INPUT)
+	$(GO) run $(SWAGGER_PACKAGE) generate spec --exclude "$(SWAGGER_EXCLUDE)" --input "$(SWAGGER_SPEC_INPUT)" --output './$(SWAGGER_SPEC)'
 
 .PHONY: swagger-check
 swagger-check: generate-swagger
@@ -287,9 +283,11 @@ swagger-check: generate-swagger
 
 .PHONY: swagger-validate
 swagger-validate: ## check if the swagger spec is valid
-	$(SED_INPLACE) '$(SWAGGER_SPEC_S_JSON)' './$(SWAGGER_SPEC)'
+	@# swagger "validate" requires that the "basePath" must start with a slash, but we are using Golang template "{{...}}"
+	@$(SED_INPLACE) -E -e 's|"basePath":( *)"(.*)"|"basePath":\1"/\2"|g' './$(SWAGGER_SPEC)' # add a prefix slash to basePath
+	@# FIXME: there are some warnings
 	$(GO) run $(SWAGGER_PACKAGE) validate './$(SWAGGER_SPEC)'
-	$(SED_INPLACE) '$(SWAGGER_SPEC_S_TMPL)' './$(SWAGGER_SPEC)'
+	@$(SED_INPLACE) -E -e 's|"basePath":( *)"/(.*)"|"basePath":\1"\2"|g' './$(SWAGGER_SPEC)' # remove the prefix slash from basePath
 
 .PHONY: checks
 checks: checks-frontend checks-backend ## run various consistency checks
@@ -380,6 +378,7 @@ lint-go-gopls: ## lint go files with gopls
 
 .PHONY: lint-editorconfig
 lint-editorconfig:
+	@echo "Running editorconfig check..."
 	@$(GO) run $(EDITORCONFIG_CHECKER_PACKAGE) $(EDITORCONFIG_FILES)
 
 .PHONY: lint-actions
diff --git a/routers/api/v1/api.go b/routers/api/v1/api.go
index 907a2f08fe..bc76b5285e 100644
--- a/routers/api/v1/api.go
+++ b/routers/api/v1/api.go
@@ -7,8 +7,6 @@
 // This documentation describes the Gitea API.
 //
 //	Schemes: https, http
-//	BasePath: /api/v1
-//	Version: {{AppVer | JSEscape}}
 //	License: MIT http://opensource.org/licenses/MIT
 //
 //	Consumes:
diff --git a/templates/swagger/v1_input.json b/templates/swagger/v1_input.json
new file mode 100644
index 0000000000..1979febebb
--- /dev/null
+++ b/templates/swagger/v1_input.json
@@ -0,0 +1,6 @@
+{
+  "info": {
+    "version": "{{AppVer | JSEscape}}"
+  },
+  "basePath": "{{AppSubUrl | JSEscape}}/api/v1"
+}
diff --git a/templates/swagger/v1_json.tmpl b/templates/swagger/v1_json.tmpl
index d173f3161b..fd3e2a70f1 100644
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@@ -27580,4 +27580,4 @@
       "TOTPHeader": []
     }
   ]
-}
+}
\ No newline at end of file