diff --git a/NOTICE b/NOTICE
index 20a92e2..fe08e18 100644
--- a/NOTICE
+++ b/NOTICE
@@ -1,5 +1,5 @@
 Apache Mynewt
-Copyright 2015-2020 The Apache Software Foundation
+Copyright 2015-2021 The Apache Software Foundation
 
 This product includes software developed at
 The Apache Software Foundation (http://www.apache.org/).
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 4f6d5f8..370b4db 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,6 +1,6 @@
 # RELEASE NOTES
 
-18 March 2020 - Apache Mynewt v1.8.0
+24 March 2021 - Apache Mynewt v1.9.0
 
 For full release notes, please visit the
 [Apache Mynewt Wiki](https://cwiki.apache.org/confluence/display/MYNEWT/Release+Notes).
diff --git a/repository.yml b/repository.yml
index 6beedc8..e03d8f6 100644
--- a/repository.yml
+++ b/repository.yml
@@ -37,6 +37,7 @@
     "1.6.0": "mynewt_1_6_0_tag"
     "1.7.0": "mynewt_1_7_0_tag"
     "1.8.0": "mynewt_1_8_0_tag"
+    "1.9.0": "mynewt_1_9_0_tag"
 
     "0-latest": "1.8.0"
     "1-latest": "1.8.0"
@@ -53,6 +54,7 @@
     "1.6-latest": "1.6.0"
     "1.7-latest": "1.7.0"
     "1.8-latest": "1.8.0"
+    "1.9-latest": "1.9.0"
 
 repo.newt_compatibility:
     # Allow all versions for 0.0.0.  This is a workaround to prevent a warning
@@ -69,6 +71,9 @@
     # Core 1.6.0+ requires newt 1.6.0+ (feature: choice)
     # Core 1.7.0+ requires newt 1.7.0+ (feature: range)
     # Core 1.8.0+ requires newt 1.8.0+ (feature: version.yml not needed)
+    # Core 1.9.0+ requires newt 1.9.0+ (feature: sysval restrictions relaxed)
+    1.9.0:
+        1.9.0: good
     1.8.0:
         1.8.0: good
     1.7.0:
@@ -101,6 +106,7 @@
             mynewt_1_6_0_tag: 1.1.0
             mynewt_1_7_0_tag: 1.2.0
             mynewt_1_8_0_tag: 1.3.0
+            mynewt_1_9_0_tag: 1.4.0
 
     mcuboot:
         type: github
@@ -110,6 +116,7 @@
             master: 0-dev
             mynewt_1_7_0_tag: 1.3.1
             mynewt_1_8_0_tag: 1.5.0
+            mynewt_1_9_0_tag: 1.7.2
 
     apache-mynewt-mcumgr:
         type: github
@@ -118,3 +125,4 @@
         vers:
             master: 0-dev
             mynewt_1_8_0_tag: 0.1.0
+            mynewt_1_9_0_tag: 0.2.0