diff --git a/.gitignore b/.gitignore
index f0353b6..b93d4f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,3 +13,7 @@ pom.xml.asc
 .nrepl-port
 /.idea/*
 *.iml
+/.cpcache/
+/.clj-kondo/.cache/
+/.lsp/.cache/
+/.calva/output-window/
diff --git a/src/kee_frame/router.cljc b/src/kee_frame/router.cljc
index 410853d..19d3ca2 100644
--- a/src/kee_frame/router.cljc
+++ b/src/kee_frame/router.cljc
@@ -58,13 +58,21 @@
   (let [[_ path-params] route
         {:keys [path] :as match} (apply reitit/match-by-name routes route)]
     (when (valid? match)
-      (str (when hash? (str base-path "/#")) path
+      (str base-path (when hash? "/#") path
            (when-some [q (:query-string path-params)] (str "?" q))
            (when-some [h (:hash path-params)] (str "#" h))))))
 
+(defn- remove-base-path [url base-path]
+  ;; i don't want to think about how to quote the regex
+  ;; also we would pay for compilation on every check
+  (if (str/starts-with? url base-path)
+    (subs url (count base-path))
+    url))
+
 (defn match-url [routes base-path url]
   (let [[path+query fragment] (-> url
-                                  (str/replace (re-pattern (str "^" base-path "/?#/")) "/")
+                                  (remove-base-path base-path)
+                                  (str/replace #"^/#/" "/")
                                   (str/split #"#" 2))
         [path query] (str/split path+query #"\?" 2)]
     (some-> (reitit/match-by-path routes path)
@@ -119,7 +127,7 @@
 
 (defn start! [{:keys [routes initial-db router app-db-spec root-component chain-links
                       screen scroll global-interceptors log-spec-error base-path]
-               :or   {scroll true base-path "/"}
+               :or   {scroll true base-path ""}
                :as   config}]
   (deprecations config)
   (when app-db-spec
diff --git a/test/kee_frame/router_test.cljc b/test/kee_frame/router_test.cljc
index b4fa994..0642aaf 100644
--- a/test/kee_frame/router_test.cljc
+++ b/test/kee_frame/router_test.cljc
@@ -4,16 +4,17 @@
             [kee-frame.api :as api]
             [reitit.core :as reitit]))
 
-(defn router [routes hash?] (router/->ReititRouter (reitit/router routes) hash? nil))
+(defn router [routes hash? base-path] (router/->ReititRouter (reitit/router routes) hash? base-path nil))
 
-(deftest can-produce-hash-urls
+(defn produce-urls-helper [hash? base-path]
   (let [r (router [["/" :root]
-                   ["/item/:id" :item]] true)]
+                   ["/item/:id" :item]] hash? base-path)
+        hash-path (if hash? "/#" "")]
     (testing "Root"
-      (is (= "/#/" (api/data->url r [:root]))))
+      (is (= (str base-path hash-path "/") (api/data->url r [:root]))))
 
     (testing "Item"
-      (is (= "/#/item/1" (api/data->url r [:item {:id 1}]))))
+      (is (= (str base-path hash-path "/item/1") (api/data->url r [:item {:id 1}]))))
 
     (testing "Item with missing id throws"
       (is (thrown?
@@ -21,17 +22,29 @@
               :cljs js/Error)
            (api/data->url r [:item]))))))
 
-(deftest can-parse-hash-urls
+(defn parse-urls-helper [hash? base-path]
   (let [r (router [["/" :root]
-                   ["/item/:id" :item]] true)]
+                   ["/item/:id" :item]] true base-path)
+        hash-path (if hash? "/#" "")]
 
     (testing "Root"
-      (is (= :root (-> (api/url->data r "/")
+      (is (= :root (-> (api/url->data r (str base-path hash-path "/"))
                        :data
                        :name))))
 
     (testing "Item with path params and query string"
-      (let [{:keys [data path-params query-string]} (api/url->data r "/item/1?query=string")]
+      (let [{:keys [data path-params query-string]} 
+            (api/url->data r (str base-path hash-path "/item/1?query=string"))]
         (is (= "query=string" query-string))
         (is (= :item (:name data)))
         (is (= "1" (:id path-params)))))))
+
+(deftest can-produce-urls
+  (doseq [hash?      [true false]
+          base-path  ["" "/prefix"]]
+    (produce-urls-helper hash? base-path)))
+
+(deftest can-parse-urls
+  (doseq [hash?      [true false]
+          base-path  ["" "/prefix"]]
+    (parse-urls-helper hash? base-path)))