diff --git a/modules/rules.ts b/modules/rules.ts
index 0e178e1..657d6a1 100644
--- a/modules/rules.ts
+++ b/modules/rules.ts
@@ -1,6 +1,6 @@
 export const defaultOrConstrained = (match: string): string =>
     '(' +
-    (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|=]+") +
+    (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|=+]+") +
     ')'
 
 export type RegExpFactory = (match: any) => RegExp
diff --git a/test/main.js b/test/main.js
index e641eef..66dabb7 100644
--- a/test/main.js
+++ b/test/main.js
@@ -280,4 +280,12 @@ describe('Path', function() {
             param: '1|2'
         })
     })
+
+    it('should support a wide range of characters', () => {
+        const path = new Path('/test/:param')
+
+        path.test('/test/1+2=3').should.eql({
+            param: '1+2=3'
+        })
+    })
 })