diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c54bf0..e826083 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
 # Change Log
 
-## 1.7.1 - 2019-12-17
+## 1.7.2 - 2019-12-27
+
+### Fixed
+
+- Allow a condition to specify an interface and not just classes.
+
+## 1.7.1 - 2019-12-26
 
 ### Fixed
 
diff --git a/src/ClassDiscovery.php b/src/ClassDiscovery.php
index ac4b2d8..355d076 100644
--- a/src/ClassDiscovery.php
+++ b/src/ClassDiscovery.php
@@ -228,7 +228,7 @@ protected static function instantiateClass($class)
     public static function safeClassExists($class)
     {
         try {
-            return class_exists($class);
+            return class_exists($class) || interface_exists($class);
         } catch (\Exception $e) {
             return false;
         }