diff --git a/src/navi/core.clj b/src/navi/core.clj
index ac30ec8..17f9261 100644
--- a/src/navi/core.clj
+++ b/src/navi/core.clj
@@ -85,6 +85,13 @@
               .getSchema
               schema->spec))))
 
+(defn matches-regex?
+  [exp s]
+  (-> exp
+      (re-pattern)
+      (re-matches s)
+      (some?)))
+
 (defmulti spec
   (fn [^Schema schema]
     (or (first (.getTypes schema)) "null")))
@@ -92,9 +99,13 @@
 (defmethod spec
   "string"
   [^Schema schema]
-  (if (= "uuid" (.getFormat schema))
-    uuid?
-    string?))
+  (let [content-fn (if (= "uuid" (.getFormat schema))
+                     uuid?
+                     string?)
+        pattern (.getPattern schema)]
+    (if pattern
+      [:and content-fn [:fn #(matches-regex? pattern %)]]
+      content-fn)))
 
 (defmethod spec
   "integer"
@@ -283,4 +294,6 @@
   (-> "api.yaml"
       slurp
       (routes-from handlers)
-      pp/pprint))
+      pp/pprint)
+
+  (matches-regex? "^(\\d+)([KMGTPE]i{0,1})$" "1024Mi"))
diff --git a/test/navi/core_test.clj b/test/navi/core_test.clj
index 9f7e2a8..b1469da 100644
--- a/test/navi/core_test.clj
+++ b/test/navi/core_test.clj
@@ -121,12 +121,20 @@
            (core/schema->spec (doto (Schema.)
                                 (.addType "string")
                                 (.setFormat "uuid"))))))
-
   (testing "jsonschemas with multiple types"
     (let [strint (-> (JsonSchema.)
                      (.types #{"string" "integer"}))]
       (is (#{[:or string? int?] [:or int? string?]}
-           (core/schema->spec strint))))))
+           (core/schema->spec strint)))))
+  (testing "regex string"
+    (let [[kw1 fn1 [kw2 fn2]] (core/schema->spec (doto (Schema.)
+                                                   (.addType "string")
+                                                   (.setPattern "^(\\d+)([KMGTPE]i{0,1})$")))]
+      (is (= :and kw1))
+      (is (= string? fn1))
+      (is (= :fn kw2))
+      (is (fn2 "1024Ki"))
+      (is (not (fn2 "1024Kib"))))))
 
 (deftest responses-to-malli-spec
   (testing "empty response"