diff --git a/modules/reitit-openapi/src/reitit/openapi.cljc b/modules/reitit-openapi/src/reitit/openapi.cljc
index b845e889..e37f93c3 100644
--- a/modules/reitit-openapi/src/reitit/openapi.cljc
+++ b/modules/reitit-openapi/src/reitit/openapi.cljc
@@ -9,7 +9,7 @@
 
 (s/def ::id (s/or :keyword keyword? :set (s/coll-of keyword? :into #{})))
 (s/def ::no-doc boolean?)
-(s/def ::tags (s/coll-of (s/or :keyword keyword? :string string?)))
+(s/def ::tags (s/coll-of (s/or :keyword keyword? :string string?) :kind set?))
 (s/def ::summary string?)
 (s/def ::description string?)
 (s/def :openapi/request-content-types (s/coll-of string?))
diff --git a/modules/reitit-swagger/src/reitit/swagger.cljc b/modules/reitit-swagger/src/reitit/swagger.cljc
index 9525035b..26c9073d 100644
--- a/modules/reitit-swagger/src/reitit/swagger.cljc
+++ b/modules/reitit-swagger/src/reitit/swagger.cljc
@@ -9,7 +9,7 @@
 
 (s/def ::id (s/or :keyword keyword? :set (s/coll-of keyword? :into #{})))
 (s/def ::no-doc boolean?)
-(s/def ::tags (s/coll-of (s/or :keyword keyword? :string string?) :kind #{}))
+(s/def ::tags (s/coll-of (s/or :keyword keyword? :string string?) :kind set?))
 (s/def ::operationId string?)
 (s/def ::summary string?)
 (s/def ::description string?)