diff --git a/include/kernel/drivers/ports/ports.h b/include/kernel/drivers/ports/ports.h
index a26c64d..9c41ad0 100644
--- a/include/kernel/drivers/ports/ports.h
+++ b/include/kernel/drivers/ports/ports.h
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 #ifndef TSOS_DRV_PORTS_H 
 #define TSOS_DRV_PORTS_H
 
diff --git a/include/kernel/drivers/vga/screen.h b/include/kernel/drivers/vga/screen.h
index b8f2767..d673555 100644
--- a/include/kernel/drivers/vga/screen.h
+++ b/include/kernel/drivers/vga/screen.h
@@ -1,3 +1,20 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+
 #ifndef TSOS_DRV_VGA_SCREEN
 #define TSOS_DRV_VGA_SCREEN
 
diff --git a/include/kernel/ktypes.h b/include/kernel/ktypes.h
index 2c3e263..00c9b7a 100644
--- a/include/kernel/ktypes.h
+++ b/include/kernel/ktypes.h
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 // Shorthand definitions of various types
 // used in the kernel
 #ifndef TSOS_KTYPES
diff --git a/src/boot/gdt.s b/src/boot/gdt.s
index 4ecab9c..3e2a0da 100644
--- a/src/boot/gdt.s
+++ b/src/boot/gdt.s
@@ -1,3 +1,17 @@
+; Copyright 2022 Mattia Giambirtone & Contributors
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
 ; Definition of our Global Descriptor Table
 
 gdt_start: ; The labels are important to compute the size of the GDT: don't touch them!
diff --git a/src/boot/mbr.s b/src/boot/mbr.s
index de70614..7fb7448 100644
--- a/src/boot/mbr.s
+++ b/src/boot/mbr.s
@@ -1,3 +1,17 @@
+; Copyright 2022 Mattia Giambirtone & Contributors
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
 ; Definition of the MBR (Master Boot Record). This is basically our bootloader and
 ; is located in the first 512 bytes of the drive we're booting from. From here, we
 ; do some basic setup and then call into the kernel
diff --git a/src/boot/switch32.s b/src/boot/switch32.s
index 1972cd4..7fa64ce 100644
--- a/src/boot/switch32.s
+++ b/src/boot/switch32.s
@@ -1,3 +1,19 @@
+; Copyright 2022 Mattia Giambirtone & Contributors
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
+; Utilities to switch to protected mode and load our GDT
+
 [bits 16]
 switch_to_protected_mode:
     cli ; We disable interrupts...
diff --git a/src/boot/util/io.s b/src/boot/util/io.s
index c6795b4..3f8f9ac 100644
--- a/src/boot/util/io.s
+++ b/src/boot/util/io.s
@@ -1,3 +1,16 @@
+; Copyright 2022 Mattia Giambirtone & Contributors
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
 
 ; Some utilities to deal with the TTY using the BIOS
 ; during real mode and writing directly to VGA memory
diff --git a/src/entrypoint.s b/src/entrypoint.s
index 3b0d6bb..96f1a89 100644
--- a/src/entrypoint.s
+++ b/src/entrypoint.s
@@ -1,3 +1,19 @@
+; Copyright 2022 Mattia Giambirtone & Contributors
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+; http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
+; The 32-bit entrypoint into our kernel. Goodbye assembly, hello C!
+
 [bits 32]
 [extern kmain]
 call kmain
diff --git a/src/kernel/drivers/ports/ports.c b/src/kernel/drivers/ports/ports.c
index ea57735..b6ccaaf 100644
--- a/src/kernel/drivers/ports/ports.c
+++ b/src/kernel/drivers/ports/ports.c
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 // Utilities for writing to and reading from I/O ports
 
 #include "kernel/drivers/ports/ports.h"
diff --git a/src/kernel/drivers/vga/screen.c b/src/kernel/drivers/vga/screen.c
index 5998821..e355f7f 100644
--- a/src/kernel/drivers/vga/screen.c
+++ b/src/kernel/drivers/vga/screen.c
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 // Implementation of a simple text-only VGA driver
 #include "kernel/drivers/vga/screen.h"
 #include "kernel/ktypes.h"
diff --git a/src/kernel/main.c b/src/kernel/main.c
index 3b5ff89..18e45bb 100644
--- a/src/kernel/main.c
+++ b/src/kernel/main.c
@@ -1,3 +1,19 @@
+/*
+Copyright 2022 Mattia Giambirtone & Contributors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
 // Entry point of the TSOS kernel
 #include "kernel/ktypes.h"
 #include "kernel/drivers/vga/screen.h"