diff --git a/package.yml b/package.yml
--- a/package.yml
+++ b/package.yml
@@ -1,8 +1,8 @@
 name       : kotlin
-version    : 1.5.20
-release    : 16
+version    : 1.5.21
+release    : 17
 source     :
-    - https://github.com/JetBrains/kotlin/archive/refs/tags/v1.5.20.tar.gz : c323a42846ca12d1df2c37604bd8372cb058187d06e507a5388f7afb18c2e3f3
+    - https://github.com/JetBrains/kotlin/archive/refs/tags/v1.5.21.tar.gz : 616f3b1ac929f4bb6d438cda104a3f5687dea67742b7e84d225f4ab93f671927
     - https://download.jetbrains.com/kotlin/native/x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2.tar.gz : a048397d50fb5a2bd6cc0f89d5a30e0b8ff0373ebff9c1d78ce1f1fb7f185a50
     - https://download.jetbrains.com/kotlin/native/clang-llvm-8.0.0-linux-x86-64.tar.gz : a9ebf55170bdbe5e089dbf884e0bc52065b5b7bc52e9354415e25a36e10e56c5
     - https://download.jetbrains.com/kotlin/native/libffi-3.2.1-2-linux-x86-64.tar.gz : 9d817bbca098a2fa0f1d5a8b9e57674c30d100bb4c6aeceff18d8acc5b9f382c
diff --git a/pspec_x86_64.xml b/pspec_x86_64.xml
--- a/pspec_x86_64.xml
+++ b/pspec_x86_64.xml
@@ -1882,12 +1882,12 @@
         </Files>
     </Package>
     <History>
-        <Update release="16">
-            <Date>2021-07-11</Date>
-            <Version>1.5.20</Version>
+        <Update release="17">
+            <Date>2021-07-31</Date>
+            <Version>1.5.21</Version>
             <Comment>Packaging update</Comment>
             <Name>Campbell Jones</Name>
             <Email>dev@serebit.com</Email>
         </Update>
     </History>
 </PISI>
\ No newline at end of file