diff --git a/W/WebIO/Compat.toml b/W/WebIO/Compat.toml
index 02117dfd47ff7b6..032c87d1c788954 100644
--- a/W/WebIO/Compat.toml
+++ b/W/WebIO/Compat.toml
@@ -42,9 +42,12 @@ Requires = ["0.4.4-0.5", "1"]
 WebSockets = "1.5.0-1"
 Widgets = "0.6.2-0.6"
 
-["0.8.14-0"]
+["0.8.14-0.8.15"]
 Observables = "0.2.3-0.3"
 
+["0.8.16-0"]
+Observables = "0.3-0.4"
+
 ["0.8.3-0.8.11"]
 Compat = "0.0.0 - 3"
 JSON = "0.0.0 - 0.21"
diff --git a/W/WebIO/Versions.toml b/W/WebIO/Versions.toml
index ff1735f6adfa7fa..f97da440174a123 100644
--- a/W/WebIO/Versions.toml
+++ b/W/WebIO/Versions.toml
@@ -84,3 +84,6 @@ git-tree-sha1 = "add6b526464ab77e9decef9d2dafa46c54af6617"
 
 ["0.8.15"]
 git-tree-sha1 = "adc25e225bc334c7df6eec3b39496edfc451cc38"
+
+["0.8.16"]
+git-tree-sha1 = "5fe32e4086d49f7ab9b087296742859f3ae6d62a"