diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index a426d86b..332ab4dc 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -15,6 +15,7 @@ jobs:
         java:
           - 11
           - 17
+          - 21
       fail-fast: false
     runs-on: [ubuntu-latest]
     name: Building PA package
diff --git a/licenses/netty-buffer-4.1.106.Final.jar.sha1 b/licenses/netty-buffer-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..1f170375
--- /dev/null
+++ b/licenses/netty-buffer-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+c5495ba59a627641b3a7c23f6bcb801874c7f7b0
\ No newline at end of file
diff --git a/licenses/netty-codec-4.1.106.Final.jar.sha1 b/licenses/netty-codec-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..a75ea81b
--- /dev/null
+++ b/licenses/netty-codec-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+025171b63aa1e7a5fd8a7e4e660d6d3110241ea7
\ No newline at end of file
diff --git a/licenses/netty-codec-http-4.1.106.Final.jar.sha1 b/licenses/netty-codec-http-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..7f5d1adb
--- /dev/null
+++ b/licenses/netty-codec-http-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+21a07cdf0fc46b313fe2248f1275cdbdac0ba87b
\ No newline at end of file
diff --git a/licenses/netty-codec-http2-4.1.106.Final.jar.sha1 b/licenses/netty-codec-http2-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..c4a0c1fa
--- /dev/null
+++ b/licenses/netty-codec-http2-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+41515e8c51eeaaddceabdb4f86fbc5dbfc25b70e
\ No newline at end of file
diff --git a/licenses/netty-codec-socks-4.1.106.Final.jar.sha1 b/licenses/netty-codec-socks-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..4fc3f5c4
--- /dev/null
+++ b/licenses/netty-codec-socks-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+129f9bd6aa0cf28bfd7d45a8b6a598eed9c67702
\ No newline at end of file
diff --git a/licenses/netty-common-4.1.106.Final.jar.sha1 b/licenses/netty-common-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..bda8b937
--- /dev/null
+++ b/licenses/netty-common-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+132defb4689f41b51b483b7202b22b6e89fe35fd
\ No newline at end of file
diff --git a/licenses/netty-handler-4.1.106.Final.jar.sha1 b/licenses/netty-handler-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..749cc807
--- /dev/null
+++ b/licenses/netty-handler-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+874c970c4ff958b1140dde52bc17e6a9e7cde662
\ No newline at end of file
diff --git a/licenses/netty-handler-proxy-4.1.106.Final.jar.sha1 b/licenses/netty-handler-proxy-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..3dcfa7f2
--- /dev/null
+++ b/licenses/netty-handler-proxy-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+bffc88b7c56d7b553453e4244247a1b0ba1fdc8a
\ No newline at end of file
diff --git a/licenses/netty-resolver-4.1.106.Final.jar.sha1 b/licenses/netty-resolver-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..bd160c07
--- /dev/null
+++ b/licenses/netty-resolver-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+e185ae573db04939215f94d6ba869758dcecbde9
\ No newline at end of file
diff --git a/licenses/netty-transport-4.1.106.Final.jar.sha1 b/licenses/netty-transport-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..2dab4bff
--- /dev/null
+++ b/licenses/netty-transport-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+8fcca44ae16b98e15965093e7696832019fd6f27
\ No newline at end of file
diff --git a/licenses/netty-transport-native-unix-common-4.1.106.Final.jar.sha1 b/licenses/netty-transport-native-unix-common-4.1.106.Final.jar.sha1
new file mode 100644
index 00000000..b4b977fd
--- /dev/null
+++ b/licenses/netty-transport-native-unix-common-4.1.106.Final.jar.sha1
@@ -0,0 +1 @@
+2da179bd95903f0fa73218b8f0d02690c0cfbc94
\ No newline at end of file