1.39.4 (#397)

diff --git a/emscripten-releases-tags.txt b/emscripten-releases-tags.txt
index 7048702..f64afec 100644
--- a/emscripten-releases-tags.txt
+++ b/emscripten-releases-tags.txt
@@ -1,6 +1,7 @@
 {
   "latest": "1.39.3",
   "releases": {
+    "1.39.4":  "8bb7b0bbbca74cc58741416cc955011f22ff5ccb",
     "1.39.3":  "b024b71038d1291ed7ec23ecd553bf2c0c8d6da6",
     "1.39.2":  "c630da9163a64e08de3dd948be0a0f7a175d285b",
     "1.39.1":  "40f3caabcef7b52bdde63d3883462414d7a25bec",