diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1a18b44..194d877 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+<a name="4.0.5"></a>
+## [4.0.5](https://github.com/troch/path-parser/compare/v4.0.4...v4.0.5) (2018-05-14)
+
+
+### Bug Fixes
+
+* allow equal signs in parameters (commonly found at the end of base 64 encoded strings) ([5c98fb6](https://github.com/troch/path-parser/commit/5c98fb6))
+
+
+
 <a name="4.0.4"></a>
 ## [4.0.4](https://github.com/troch/path-parser/compare/v4.0.3...v4.0.4) (2018-04-09)
 
diff --git a/dist/cjs/path-parser.js b/dist/cjs/path-parser.js
index 190064a..466e5e4 100644
--- a/dist/cjs/path-parser.js
+++ b/dist/cjs/path-parser.js
@@ -28,7 +28,9 @@ var __assign = Object.assign || function __assign(t) {
 };
 
 var defaultOrConstrained = function (match) {
-    return '(' + (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|]+") + ')';
+    return '(' +
+        (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|=]+") +
+        ')';
 };
 var rules = [
     {
diff --git a/dist/es/path-parser.js b/dist/es/path-parser.js
index 9e65996..aa2611f 100644
--- a/dist/es/path-parser.js
+++ b/dist/es/path-parser.js
@@ -24,7 +24,9 @@ var __assign = Object.assign || function __assign(t) {
 };
 
 var defaultOrConstrained = function (match) {
-    return '(' + (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|]+") + ')';
+    return '(' +
+        (match ? match.replace(/(^<|>$)/g, '') : "[a-zA-Z0-9-_.~%':|=]+") +
+        ')';
 };
 var rules = [
     {
diff --git a/package.json b/package.json
index 70124d3..0b61101 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "path-parser",
-    "version": "4.0.4",
+    "version": "4.0.5",
     "description": "A small utility to parse, match and generate paths",
     "main": "dist/cjs/path-parser.js",
     "jsnext:main": "dist/es/path-parser.js",