diff --git a/CHANGES.md b/CHANGES.md
index 480752e..5bc7e7a 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,8 @@
 Poodinis Changelog
 ==================
+**Version 8.1.0-beta.7**
+* REVERT fix for issue #31. It broke too many valid cases.
+
 **Version 8.1.0-beta.6**
 * FIX multiple template arguments not allowed on constructor argument injection (PR #37)
 
diff --git a/README.md b/README.md
index 507e2a4..96717fd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 Poodinis Dependency Injection Framework
 =======================================
-Version 8.1.0-beta.6  
+Version 8.1.0-beta.7  
 Copyright 2014-2021 Mike Bierlee  
 Licensed under the terms of the MIT license - See [LICENSE.txt](LICENSE.txt)
 
diff --git a/source/poodinis/container.d b/source/poodinis/container.d
index debbfba..fd549e7 100644
--- a/source/poodinis/container.d
+++ b/source/poodinis/container.d
@@ -218,16 +218,6 @@ synchronized class DependencyContainer
         return newRegistration;
     }
 
-    public Registration register(SuperType, ConcreteType)(
-            RegistrationOption options = RegistrationOption.none)
-            if (!is(SuperType == ConcreteType) && !is(BaseTypeTuple!ConcreteType == AliasSeq!(Object,
-                SuperType)) && !is(BaseTypeTuple!ConcreteType == AliasSeq!(SuperType)))
-    {
-        pragma(msg, "Cannot register dependency: ", ConcreteType,
-                " is not derived from ", SuperType);
-        static assert(0, "Cannot register dependency");
-    }
-
     private bool hasOption(OptionType)(OptionType options,
             OptionType persistentOptions, OptionType option)
     {
diff --git a/test/poodinis/containertest.d b/test/poodinis/containertest.d
index 2ba1028..3c8f2df 100644
--- a/test/poodinis/containertest.d
+++ b/test/poodinis/containertest.d
@@ -673,4 +673,14 @@ version (unittest)
 
         assert(instance.preDestroyWasCalled == true);
     }
+
+    // Test register class by ancestor type
+    unittest
+    {
+        auto container = new shared DependencyContainer();
+        container.register!(Grandma, Kid);
+        auto instance = container.resolve!Grandma;
+
+        assert(instance !is null);
+    }
 }
diff --git a/test/poodinis/testclasses.d b/test/poodinis/testclasses.d
index 4e6133e..73ae5ad 100644
--- a/test/poodinis/testclasses.d
+++ b/test/poodinis/testclasses.d
@@ -789,4 +789,19 @@ version (unittest)
             this.dependency = assignedDependency;
         }
     }
+
+    class Grandma
+    {
+
+    }
+
+    class Mommy : Grandma
+    {
+
+    }
+
+    class Kid : Mommy
+    {
+
+    }
 }