diff --git a/verilog/gl/DFFRAM.v b/verilog/gl/DFFRAM.v
index bc350da..5db928b 100644
--- a/verilog/gl/DFFRAM.v
+++ b/verilog/gl/DFFRAM.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/caravel.v b/verilog/gl/caravel.v
index c68e423..243ec45 100644
--- a/verilog/gl/caravel.v
+++ b/verilog/gl/caravel.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/chip_io.v b/verilog/gl/chip_io.v
index 9c6bb4a..2caf6b7 100644
--- a/verilog/gl/chip_io.v
+++ b/verilog/gl/chip_io.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/digital_pll.v b/verilog/gl/digital_pll.v
index 001afab..72b7592 100644
--- a/verilog/gl/digital_pll.v
+++ b/verilog/gl/digital_pll.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/gpio_control_block.v b/verilog/gl/gpio_control_block.v
index 7ef8381..66e4737 100644
--- a/verilog/gl/gpio_control_block.v
+++ b/verilog/gl/gpio_control_block.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/mgmt_core.v b/verilog/gl/mgmt_core.v
index 17ce650..833b929 100644
--- a/verilog/gl/mgmt_core.v
+++ b/verilog/gl/mgmt_core.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/mgmt_protect.v b/verilog/gl/mgmt_protect.v
index 40d5357..c7f34da 100644
--- a/verilog/gl/mgmt_protect.v
+++ b/verilog/gl/mgmt_protect.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/mgmt_protect_hv.v b/verilog/gl/mgmt_protect_hv.v
index 68a4634..1c18bf4 100644
--- a/verilog/gl/mgmt_protect_hv.v
+++ b/verilog/gl/mgmt_protect_hv.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/simple_por.v b/verilog/gl/simple_por.v
index ce4133b..082b567 100644
--- a/verilog/gl/simple_por.v
+++ b/verilog/gl/simple_por.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 `default_nettype none
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
diff --git a/verilog/gl/sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped.v b/verilog/gl/sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped.v
index 7dbac90..c070cc6 100644
--- a/verilog/gl/sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped.v
+++ b/verilog/gl/sky130_fd_sc_hvl__lsbufhv2lv_1_wrapped.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/storage.v b/verilog/gl/storage.v
index 5c4fe5f..743a4fc 100644
--- a/verilog/gl/storage.v
+++ b/verilog/gl/storage.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 `default_nettype none
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
diff --git a/verilog/gl/user_id_programming.v b/verilog/gl/user_id_programming.v
index 78dbd63..4cdbaf3 100644
--- a/verilog/gl/user_id_programming.v
+++ b/verilog/gl/user_id_programming.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/user_proj_example.v b/verilog/gl/user_proj_example.v
index 8267ec2..7a25bdb 100644
--- a/verilog/gl/user_proj_example.v
+++ b/verilog/gl/user_proj_example.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+3621 (git sha1 84e9fa7, gcc 8.3.1 -fPIC -Os) */
 
diff --git a/verilog/gl/user_project_wrapper.v b/verilog/gl/user_project_wrapper.v
index 8fda509..ff8dc73 100644
--- a/verilog/gl/user_project_wrapper.v
+++ b/verilog/gl/user_project_wrapper.v
@@ -11,6 +11,7 @@
 // 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.
+// SPDX-License-Identifier: Apache-2.0
 
 /* Generated by Yosys 0.9+2406 (git sha1 347dd01, gcc 8.3.1 -fPIC -Os) */