diff --git a/src/main/java/org/adrianvictor/lib/reflection/ImplementationRegistry.java b/src/main/java/org/adrianvictor/lib/reflection/ImplementationRegistry.java
index c9afd44..cac780a 100644
--- a/src/main/java/org/adrianvictor/lib/reflection/ImplementationRegistry.java
+++ b/src/main/java/org/adrianvictor/lib/reflection/ImplementationRegistry.java
@@ -9,12 +9,13 @@ public class ImplementationRegistry {
     }
 
     public <T> T getInstance(Class<T> apiClass, String target, String replacement) {
+        String base = apiClass.getName();
+
         String implName =
-                apiClass.getName()
-                        .replace(
-                                target,
-                                replacement + classSuffix + "."
-                        );
+                base.replaceFirst(
+                        "org\\.adrianvictor\\.lib",
+                        "org.adrianvictor.lib.impl." + classSuffix
+                );
 
         try {
             Class<?> implClass = Class.forName(implName);
@@ -23,10 +24,7 @@ public class ImplementationRegistry {
                     implClass.getDeclaredConstructor().newInstance()
             );
         } catch (ReflectiveOperationException e) {
-            throw new IllegalStateException(
-                    "Cannot load " + implName,
-                    e
-            );
+            throw new IllegalStateException("Cannot load " + implName, e);
         }
     }