diff --git a/package.json b/package.json
index fbf948b63bf..c48142c8e6e 100644
--- a/package.json
+++ b/package.json
@@ -73,14 +73,14 @@
   },
   "devDependencies": {
     "@babel/preset-env": "^7.5.5",
-    "@glimmer/compiler": "0.38.5-alpha.2",
+    "@glimmer/compiler": "0.38.5-alpha.3",
     "@glimmer/env": "^0.1.7",
-    "@glimmer/interfaces": "0.38.5-alpha.2",
-    "@glimmer/node": "0.38.5-alpha.2",
-    "@glimmer/opcode-compiler": "0.38.5-alpha.2",
-    "@glimmer/program": "0.38.5-alpha.2",
-    "@glimmer/reference": "0.38.5-alpha.2",
-    "@glimmer/runtime": "0.38.5-alpha.2",
+    "@glimmer/interfaces": "0.38.5-alpha.3",
+    "@glimmer/node": "0.38.5-alpha.3",
+    "@glimmer/opcode-compiler": "0.38.5-alpha.3",
+    "@glimmer/program": "0.38.5-alpha.3",
+    "@glimmer/reference": "0.38.5-alpha.3",
+    "@glimmer/runtime": "0.38.5-alpha.3",
     "@types/qunit": "^2.5.4",
     "@types/rsvp": "^4.0.2",
     "auto-dist-tag": "^1.0.0",
diff --git a/yarn.lock b/yarn.lock
index e925b699ee0..3030c14c8f3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -995,122 +995,122 @@
   resolved "https://registry.yarnpkg.com/@ember/edition-utils/-/edition-utils-1.1.1.tgz#d5732c3da593f202e6e1ac6dbee56a758242403f"
   integrity sha512-GEhri78jdQp/xxPpM6z08KlB0wrHfnfrJ9dmQk7JeQ4XCiMzXsJci7yooQgg/IcTKCM/PxE/IkGCQAo80adMkw==
 
-"@glimmer/compiler@0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/compiler/-/compiler-0.38.5-alpha.2.tgz#a133074450c0b75446ece387edfd0f0631e49b94"
-  integrity sha512-4tx4DkKooVwX2N7J52+W25RqAwPkl91bOgHo23bMXgQSjQgHNOTHDVuB0ov+nbf5OV6cebnGkvfwsoWINc9eew==
+"@glimmer/compiler@0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/compiler/-/compiler-0.38.5-alpha.3.tgz#1e5c5e6779c95dac77e81dc96822bef035a68c57"
+  integrity sha512-ih35kzH9iCl9RP8awREVVr25+27HxcbkDQuPdApmeDTuc+7tTvr40OBcEG9GLLPfdWXd5bP5eq0hITlAQvVW4g==
   dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/syntax" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
-    "@glimmer/wire-format" "^0.38.5-alpha.2"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/syntax" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
+    "@glimmer/wire-format" "^0.38.5-alpha.3"
 
-"@glimmer/encoder@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/encoder/-/encoder-0.38.5-alpha.2.tgz#e6dd9cf971cdb225273a62b66ca05fc70d8836a5"
-  integrity sha512-X5MUstqxsj5xsNyGuXxGXwy20rc3twUAdKOgots4YLJYzG/3Sjiw6zyoxue4bKNwZ/9iyTg1kNsCCfl/ep64Rg==
+"@glimmer/encoder@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/encoder/-/encoder-0.38.5-alpha.3.tgz#a6572e09a3e56f507a6503f2921df8fcc794981c"
+  integrity sha512-T4vfEG24nIoVWLavzjaUAAP9oPenIakKcqvXQNoj5P+2aLKLJau2jAzU/vMLzv4rS+hZWD5bpz0IVWoiKiV09w==
   dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/vm" "^0.38.5-alpha.2"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/vm" "^0.38.5-alpha.3"
 
 "@glimmer/env@^0.1.7":
   version "0.1.7"
   resolved "https://registry.yarnpkg.com/@glimmer/env/-/env-0.1.7.tgz#fd2d2b55a9029c6b37a6c935e8c8871ae70dfa07"
   integrity sha1-/S0rVakCnGs3psk16MiHGucN+gc=
 
-"@glimmer/interfaces@0.38.5-alpha.2", "@glimmer/interfaces@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.38.5-alpha.2.tgz#841370dc9112402a2aaf8add8bfefab83bc26793"
-  integrity sha512-7jsfMWFTNuA5ZObbAPPV7WelPAf2aW8YbjR1Dqsvwm/3ZJ7pbX6xTx7b4VeWx8k6oDF/xgQ4txoZ4YVYlgMOqw==
+"@glimmer/interfaces@0.38.5-alpha.3", "@glimmer/interfaces@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.38.5-alpha.3.tgz#e68a51ad2900ee3929fda76d42c0b581356d8ca7"
+  integrity sha512-VvnzMeZa6+UUdDsjEHe/zjGQywMjyegKmFA45xa0fjD6bL22GoKFXucIe9oi72BWEukM2+hNd9bXYioUg8mkOA==
   dependencies:
-    "@glimmer/wire-format" "^0.38.5-alpha.2"
+    "@glimmer/wire-format" "^0.38.5-alpha.3"
     "@simple-dom/interface" "1.4.0"
 
-"@glimmer/low-level@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/low-level/-/low-level-0.38.5-alpha.2.tgz#0a8769fa7f4cce9a81e4d69ea76a7aaa817ba6db"
-  integrity sha512-GHZJ9AafVBtnWQRbEf56JCgptQm6isEdKuSD0sZUUNVkbXaxHDnHPDTDLmA7e4VZV6fKampKUgHv963Oug5dRw==
-
-"@glimmer/node@0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/node/-/node-0.38.5-alpha.2.tgz#7227de7ac22a94b2963a009953aa197575010ca7"
-  integrity sha512-4vo9uhIdbQlgfecHpFWf80fXr2q3uO3Ahe66Ab0E3SCe6VeaqrX6o4YUFF7hg05X567w9hcOcf1zp76xLBIYQw==
-  dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/runtime" "^0.38.5-alpha.2"
-
-"@glimmer/opcode-compiler@0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/opcode-compiler/-/opcode-compiler-0.38.5-alpha.2.tgz#908ce6d198aff9430ec2c9511a02b5f63cea9b98"
-  integrity sha512-eXw45wB2cyOcvX6IP/LAkn9RBRNRKV9ISxMz2S3joZclo6/J5sXFK3rfJrJ5drKdRZI8iKekYGRKa2cnUkPTtg==
-  dependencies:
-    "@glimmer/encoder" "^0.38.5-alpha.2"
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/program" "^0.38.5-alpha.2"
-    "@glimmer/reference" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
-    "@glimmer/vm" "^0.38.5-alpha.2"
-    "@glimmer/wire-format" "^0.38.5-alpha.2"
-
-"@glimmer/program@0.38.5-alpha.2", "@glimmer/program@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/program/-/program-0.38.5-alpha.2.tgz#df0e0a66c84410fa39c4b234fb37ad7b1da8dcda"
-  integrity sha512-2fHUg08rk0D4yWPV8ax7hqNW2mmWSLsEiXYcGH0ZQ7eZKgukO+pVJBvpSPIqBE8YN1iKXIi2m6xwoA4G14Cw9g==
-  dependencies:
-    "@glimmer/encoder" "^0.38.5-alpha.2"
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
-
-"@glimmer/reference@0.38.5-alpha.2", "@glimmer/reference@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/reference/-/reference-0.38.5-alpha.2.tgz#116c29293f0b44c7cd4e289f68f1f164df0f0435"
-  integrity sha512-Av60bhB1RvQoSvC9nycpRE53+GgjkaxA369iFPilGeJ6KkyoZ0pAJ8s6TS6mCtykCvBqUWrj3JZyffqc8tmWxA==
-  dependencies:
-    "@glimmer/util" "^0.38.5-alpha.2"
-
-"@glimmer/runtime@0.38.5-alpha.2", "@glimmer/runtime@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/runtime/-/runtime-0.38.5-alpha.2.tgz#d01bd5077d406b0cb96bb082193b5368cd43e6ee"
-  integrity sha512-8/uRJ1p1G+ZmGD+IXyEyoRzvVMPUVRhvATNWz2JsOhsQnWTI8CzpZxewOvtGbSfkAfKWaY85W6CymphyZ5nLyA==
-  dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/low-level" "^0.38.5-alpha.2"
-    "@glimmer/program" "^0.38.5-alpha.2"
-    "@glimmer/reference" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
-    "@glimmer/vm" "^0.38.5-alpha.2"
-    "@glimmer/wire-format" "^0.38.5-alpha.2"
+"@glimmer/low-level@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/low-level/-/low-level-0.38.5-alpha.3.tgz#4269003a4bc665da9bd4236f16803b197c518c5c"
+  integrity sha512-t+erJ598CKw43ZatsLPaLMQAySYEB00dJk/EUVBmJOCZS8413g1mnuuQJkrHiQ8nE7Zklyc2vEzKaPYgjxp67Q==
+
+"@glimmer/node@0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/node/-/node-0.38.5-alpha.3.tgz#e3d1386b4b4b1170524f6c554ef7f75de7b3d890"
+  integrity sha512-KSCXYhl1dv3UgKDQMy4pqB+BsV/BBo7Bd0N45+5OrVU0cSvXOG0Ak512UXwiVS68PQ2qz5u8vh/+chFh5wLa2A==
+  dependencies:
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/runtime" "^0.38.5-alpha.3"
+
+"@glimmer/opcode-compiler@0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/opcode-compiler/-/opcode-compiler-0.38.5-alpha.3.tgz#48d287f5d0342162f2afcb29dc55e6b87695a94c"
+  integrity sha512-CrqmYvVVe1460ownzS48NOXI7nlfvMTfM1rrzGw7hv3h2UwQ7EHedO81Mg7Hsb/fc/C4UxvMpfiicKeQVbzh5g==
+  dependencies:
+    "@glimmer/encoder" "^0.38.5-alpha.3"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/program" "^0.38.5-alpha.3"
+    "@glimmer/reference" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
+    "@glimmer/vm" "^0.38.5-alpha.3"
+    "@glimmer/wire-format" "^0.38.5-alpha.3"
+
+"@glimmer/program@0.38.5-alpha.3", "@glimmer/program@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/program/-/program-0.38.5-alpha.3.tgz#55a32da10cb33c1fd436f35c77f7750a332008d4"
+  integrity sha512-Neyi4jGS7/igXMc+bpIETRQWLgDQuU6vxvwbIpOWAtf8MFInBl42Bo6rekcVktPmsNxPPBpjEDnapucteYE8gA==
+  dependencies:
+    "@glimmer/encoder" "^0.38.5-alpha.3"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
+
+"@glimmer/reference@0.38.5-alpha.3", "@glimmer/reference@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/reference/-/reference-0.38.5-alpha.3.tgz#f5291bc7f5adfaa8583b00696a7fdab3889ad781"
+  integrity sha512-F7rZha3h3/xuR2xLDYRJY0GlWh5ctSNI8OXQ9+L3E9DYVpqtqGQUfWAUfPVBmqXRyJzppIS2BceCTT4vaXpHKg==
+  dependencies:
+    "@glimmer/util" "^0.38.5-alpha.3"
+
+"@glimmer/runtime@0.38.5-alpha.3", "@glimmer/runtime@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/runtime/-/runtime-0.38.5-alpha.3.tgz#74255bbedea684b9460ab7be86ba31c9be8a0a6d"
+  integrity sha512-ofMBR984oNfvCR6z2RTSzZr3e897JW95xK/MQcfr1P3UCJr7+zdKECm861cNVMOmaCH2bv2rQxoplWs1SEULXg==
+  dependencies:
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/low-level" "^0.38.5-alpha.3"
+    "@glimmer/program" "^0.38.5-alpha.3"
+    "@glimmer/reference" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
+    "@glimmer/vm" "^0.38.5-alpha.3"
+    "@glimmer/wire-format" "^0.38.5-alpha.3"
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/syntax@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.38.5-alpha.2.tgz#cfdb27d351b741a6103d4994943d0b7c44b548eb"
-  integrity sha512-jKqhuNY/qyDLum/+93ycbblwflZyH0SuKrSnC2CMf5JBSNFmTrfVTzJyp7rzSJwcSfY3ul5qh8swH7KHCB7uDA==
+"@glimmer/syntax@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.38.5-alpha.3.tgz#da6c1daba1ada18493a1fc0879b2e8d1313b35af"
+  integrity sha512-hpYevmtgXrJxqJ9/07VAUNx86FGzoCcZi5SzVdFmN/YUuWEdjZjx2bNOCUDSx8SwssWpJJnxizHx77YII0Ftbw==
   dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
     handlebars "^4.0.6"
     simple-html-tokenizer "^0.5.8"
 
-"@glimmer/util@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.38.5-alpha.2.tgz#3f9c7be15e44746723d42558cfbd843943d11e33"
-  integrity sha512-uBqYFqwgl4x/socwx/RYsKG6NWrHtn5BQozX2vrGfcAQJ2U9DL1BwzxzNH8JNodECjdKCUyVwFjI3xWOmSYxRg==
+"@glimmer/util@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.38.5-alpha.3.tgz#8d8084cef9ebbac1a757ac1b5bc6ba4948bd7e68"
+  integrity sha512-0gu7hN37tYhsGy+eHrAEYcielPNwDXsMo3IvD02K8MPJNHfhitofV5kFYJ8DpkNvZ5gMhD2As/461XKrwUdQKw==
 
-"@glimmer/vm@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/vm/-/vm-0.38.5-alpha.2.tgz#de950abab4652cb043869222ecc9752ee7fac7ce"
-  integrity sha512-4Wypuu8cVE1eO17Zjp+SJWaIAZIoSAawNhJX0TA6d+qNBKPjzJLRPYUEKY5ti6hPl/lkIgCuVNGcTG34mr/sKw==
+"@glimmer/vm@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/vm/-/vm-0.38.5-alpha.3.tgz#d2a3477db184b7bbcb04270d3dc25a271d3c9f5c"
+  integrity sha512-ODW/hIzksJGm4aMjWb6QA1QeLqkLxfkbdvyvoH+WMhXvKkjsf9fQA9TYYPJD7ATe8KkaQWqyRatvqYS+3OoHng==
   dependencies:
-    "@glimmer/interfaces" "^0.38.5-alpha.2"
-    "@glimmer/util" "^0.38.5-alpha.2"
+    "@glimmer/interfaces" "^0.38.5-alpha.3"
+    "@glimmer/util" "^0.38.5-alpha.3"
 
-"@glimmer/wire-format@^0.38.5-alpha.2":
-  version "0.38.5-alpha.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/wire-format/-/wire-format-0.38.5-alpha.2.tgz#9d699deaad4d2da2b67089e0d9eb733c14663b6c"
-  integrity sha512-NGmmqYdh+4bIffsaWZ6CVFOtoiahBfmLLr15++WYO2BIuKcLra7ZgvoBKciKu0y9x4Xd3Rt8lRS/CNdMvqzBLA==
+"@glimmer/wire-format@^0.38.5-alpha.3":
+  version "0.38.5-alpha.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/wire-format/-/wire-format-0.38.5-alpha.3.tgz#f79cc3b886a0fa322d8743820eb88d25a7f8304f"
+  integrity sha512-HQaNJCDTHNQTrTwCSKNB2vAsHW/gbYl+C7hPyZSbSYsEz3y+YOf6eZC8GSUMprErBeWkSLdXAa0RYUavUEEzLQ==
   dependencies:
-    "@glimmer/util" "^0.38.5-alpha.2"
+    "@glimmer/util" "^0.38.5-alpha.3"
 
 "@simple-dom/document@^1.4.0":
   version "1.4.0"