diff --git a/build.sbt b/build.sbt
index e7f8f14..4ce7137 100644
--- a/build.sbt
+++ b/build.sbt
@@ -58,4 +58,4 @@ lazy val scuid =
       )
     )
 
-lazy val root = tlCrossRootProject.aggregate(core, scuid)
+lazy val root = tlCrossRootProject.aggregate(core, scuid, uuid)
diff --git a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/HumanUuidOps.scala b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/HumanUuidOps.scala
index fd873f6..ea85d12 100644
--- a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/HumanUuidOps.scala
+++ b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/HumanUuidOps.scala
@@ -1,3 +1,24 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 package me.wojnowski.humanoid.uuid
 
 import me.wojnowski.humanoid.HumanIdOps
diff --git a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdConverter.scala b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdConverter.scala
index 8a57206..056f871 100644
--- a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdConverter.scala
+++ b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdConverter.scala
@@ -1,3 +1,24 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 package me.wojnowski.humanoid.uuid
 
 import me.wojnowski.humanoid.IdConverter
diff --git a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdGenerator.scala b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdGenerator.scala
index 0595572..1e9a172 100644
--- a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdGenerator.scala
+++ b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/UuidIdGenerator.scala
@@ -1,7 +1,28 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 package me.wojnowski.humanoid.uuid
 
-import me.wojnowski.humanoid.IdGenerator
 import cats.effect.std.UUIDGen
+import me.wojnowski.humanoid.IdGenerator
 
 import java.util.UUID
 
diff --git a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/package.scala b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/package.scala
index cf0162e..027dd15 100644
--- a/uuid/src/main/scala/me/wojnowski/humanoid/uuid/package.scala
+++ b/uuid/src/main/scala/me/wojnowski/humanoid/uuid/package.scala
@@ -1,3 +1,24 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 package me.wojnowski.humanoid
 
 import java.util.UUID
diff --git a/uuid/src/test/scala/UuidGeneratorTest.scala b/uuid/src/test/scala/UuidGeneratorTest.scala
index a6893d9..41587f8 100644
--- a/uuid/src/test/scala/UuidGeneratorTest.scala
+++ b/uuid/src/test/scala/UuidGeneratorTest.scala
@@ -1,3 +1,24 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 import cats.effect.std.UUIDGen
 import me.wojnowski.humanoid.HumanId
 import me.wojnowski.humanoid.HumanIdOps
@@ -14,7 +35,7 @@ class UuidGeneratorTest extends FunSuite {
 
   val uuid1 = UUID.fromString("076831d6-41a0-4161-9217-fc04ac8fa5a2")
 
-  implicit val constTryUuidGen = new UUIDGen[Try] {
+  implicit val constTryUuidGen: UUIDGen[Try] = new UUIDGen[Try] {
     override def randomUUID: Try[UUID] = Success(uuid1)
   }
 
diff --git a/uuid/src/test/scala/UuidIdConverterTest.scala b/uuid/src/test/scala/UuidIdConverterTest.scala
index ecf2d36..4f2e2e1 100644
--- a/uuid/src/test/scala/UuidIdConverterTest.scala
+++ b/uuid/src/test/scala/UuidIdConverterTest.scala
@@ -1,3 +1,24 @@
+/*
+ * Copyright (c) 2023 Jakub Wojnowski
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
 import me.wojnowski.humanoid.HumanId
 import me.wojnowski.humanoid.HumanIdOps
 import munit.FunSuite