diff --git a/package.json b/package.json
index bdcac6e87a2..8d2a767e84c 100644
--- a/package.json
+++ b/package.json
@@ -74,15 +74,15 @@
   },
   "devDependencies": {
     "@babel/preset-env": "^7.9.5",
-    "@glimmer/compiler": "^0.54.2",
+    "@glimmer/compiler": "^0.55.1",
     "@glimmer/env": "^0.1.7",
-    "@glimmer/interfaces": "^0.54.2",
-    "@glimmer/node": "^0.54.2",
-    "@glimmer/opcode-compiler": "^0.54.2",
-    "@glimmer/program": "^0.54.2",
-    "@glimmer/reference": "^0.54.2",
-    "@glimmer/runtime": "^0.54.2",
-    "@glimmer/validator": "^0.54.2",
+    "@glimmer/interfaces": "^0.55.1",
+    "@glimmer/node": "^0.55.1",
+    "@glimmer/opcode-compiler": "^0.55.1",
+    "@glimmer/program": "^0.55.1",
+    "@glimmer/reference": "^0.55.1",
+    "@glimmer/runtime": "^0.55.1",
+    "@glimmer/validator": "^0.55.1",
     "@simple-dom/document": "^1.4.0",
     "@types/qunit": "^2.9.1",
     "@types/rsvp": "^4.0.3",
diff --git a/yarn.lock b/yarn.lock
index 1f8b045d0e4..792531ec789 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -913,142 +913,142 @@
   resolved "https://registry.yarnpkg.com/@ember/edition-utils/-/edition-utils-1.2.0.tgz#a039f542dc14c8e8299c81cd5abba95e2459cfa6"
   integrity sha512-VmVq/8saCaPdesQmftPqbFtxJWrzxNGSQ+e8x8LLe3Hjm36pJ04Q8LeORGZkAeOhldoUX9seLGmSaHeXkIqoog==
 
-"@glimmer/compiler@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/compiler/-/compiler-0.54.2.tgz#e81b7302ebac707dfd5b6af438c4da1e7571ccc0"
-  integrity sha512-1e4vYznBYz7OmEpW7ZhO2D3xYy2W1sOXMeJFEQ+yGagQp9M4FdEERJSMYpcslJ0TFYWxY5xrg8F2et+fZpSadQ==
-  dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/syntax" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
-    "@glimmer/wire-format" "^0.54.2"
+"@glimmer/compiler@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/compiler/-/compiler-0.55.1.tgz#c85fcbf00125c7c0fb74cd179a9e30c42dddccee"
+  integrity sha512-t4jFag9i1/jo9JId2VMPuFOIY0E8MlRmyMnfh9mipC9iZXZsC8d0PCia6/FvZRvUJvNRA+brMwck6IHfiW2Nmw==
+  dependencies:
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/syntax" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
+    "@glimmer/wire-format" "^0.55.1"
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/encoder@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/encoder/-/encoder-0.54.2.tgz#bcae3d066f4408335b629841190cb53fe424a668"
-  integrity sha512-HBiEAA4/PJFJvI/7TsObv0UwfoI/nrhvdMpgng9uW6O7ztucq7mdKvaVYvCOsgGo7X2X+3pjL3kKtRlihRinUw==
+"@glimmer/encoder@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/encoder/-/encoder-0.55.1.tgz#1356c123e61d43fed9b3a36a189cd1776974dae2"
+  integrity sha512-Q3WueSDKYxCnQlk/0Sp1rpyMckh553zwA3yQ9PE25pEnt9LVnfn3TWGKb4XOAjiaGt0hyDLfFI7Ftt+4rbsCOA==
   dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/vm" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/vm" "^0.55.1"
 
 "@glimmer/env@0.1.7", "@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@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.54.2.tgz#d7735869050ca7e1731424aa64ae37b1cb853091"
-  integrity sha512-Gqvr6Eh4Xy7lF14GZi6RbnVeA7gDj2pXMJtdh68TFL2u/VqfhTXy4+IFRvUh4bpJj+1YayNFupuJSn0oVrEDGQ==
+"@glimmer/interfaces@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.55.1.tgz#be9499d83a63514b2470f19e5430b06c7edb2076"
+  integrity sha512-rbmL/xT9mHWX2jioYLT0V/H0QS8qaIJ1HCOlkbX5zvAASNu8+kwTXy8Bq4hx1OW3qwul6ihfHq/6k2oLxJ90JQ==
   dependencies:
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/low-level@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/low-level/-/low-level-0.54.2.tgz#ba6c49e64b1edc17229930785eb900ca294f9247"
-  integrity sha512-zvqOvkN1FzaQWy2n9CNqTWj7ziyVvAL82CE6wT9Wumw0R6JiS4UnL+EymWLltvRxdO9k7tfVH1sIacx2+H1WEQ==
+"@glimmer/low-level@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/low-level/-/low-level-0.55.1.tgz#f3ab819637cfb0a38c04bd675b28ebb3f4bd238d"
+  integrity sha512-wK0Lkb7P3ajOcMbzCrDokC13GAtvyABrF+KYkNlNMzrCBSZ0q9BsFXRhSHhO4UIZm4jQmbaQVOy5SYdoB4Bu2A==
 
-"@glimmer/node@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/node/-/node-0.54.2.tgz#ac3ecd45cd2738e7b0e1a2232950e73926efbcf7"
-  integrity sha512-TG6z/L/cDYgN6VOkoJKhXlTvq6sNTdARzEBCryp2jbIU3o7SGx5OZjcCjsH+vELEntWrh/b7RXFo9areaKUSWg==
+"@glimmer/node@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/node/-/node-0.55.1.tgz#0d6fd43b6f4cbd0a0b47c0482cfd047f31bff5b7"
+  integrity sha512-PgAkx8tSJc4xWyVS4qCSNo13KNRklUZDShQmhoFOv9nvCZdWLcUv1SZJshGQlmwQNxY6YCHjRlnRJN17VBcZBQ==
   dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/runtime" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/runtime" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
     "@simple-dom/document" "^1.4.0"
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/opcode-compiler@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/opcode-compiler/-/opcode-compiler-0.54.2.tgz#55cab6ebcb8134b4bbcacbdeedbb10b2b55f597f"
-  integrity sha512-yHdhAUeNJqqH6I91kbi07/K7sk7nfGl6Bp9zA5oVYe+PnFTWsMAtySQT51QFie7vXgPNiHq+M1YWOtqBSGKm6A==
-  dependencies:
-    "@glimmer/encoder" "^0.54.2"
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/program" "^0.54.2"
-    "@glimmer/reference" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
-    "@glimmer/vm" "^0.54.2"
-    "@glimmer/wire-format" "^0.54.2"
-
-"@glimmer/program@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/program/-/program-0.54.2.tgz#2ce978a3bdd853804d2d03021f9a7616fb2f9607"
-  integrity sha512-CQIwVMtE3Hh6W8NkombU1sh8CUgZUCESrhQx42eK58Rf8fEOQOxGdFbrz2TzXM2jNCE3buh1vwSVC0oKAdsQLg==
-  dependencies:
-    "@glimmer/encoder" "^0.54.2"
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
-
-"@glimmer/reference@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/reference/-/reference-0.54.2.tgz#996509e483f7299f5191260ab622db5816485a3a"
-  integrity sha512-upBx3AMJVf3BkGN0UtgVVapcdjR7g/UF/GkQWcrzIOGchDFnFhY443Ys1oLtMNBA02RhtUr+U8KzUSsFV3sfsw==
+"@glimmer/opcode-compiler@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/opcode-compiler/-/opcode-compiler-0.55.1.tgz#d71e67ad3b4a0852c4aad45f2ca9dff0010e60fb"
+  integrity sha512-b/xH+2It9MtpK4PbltUnlLtjQdX4eaggWXrS86i+leSXfj2F6BtBPZd7k9QZGcXXGHuZmuF0fQXZrN1LN8pxDA==
+  dependencies:
+    "@glimmer/encoder" "^0.55.1"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/program" "^0.55.1"
+    "@glimmer/reference" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
+    "@glimmer/vm" "^0.55.1"
+    "@glimmer/wire-format" "^0.55.1"
+
+"@glimmer/program@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/program/-/program-0.55.1.tgz#19b0af648044ac2e727a25fb446dd30fa6aa6264"
+  integrity sha512-JXPF1o6hHp9SX3MX+l2t4B61mJp4YGO5LWV1E0ciHUGGQSVaHh7DUnc0Qje36yUthVbB6qT5I0GWF487Egzgyg==
+  dependencies:
+    "@glimmer/encoder" "^0.55.1"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
+
+"@glimmer/reference@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/reference/-/reference-0.55.1.tgz#6f5028a16ea449e57f0e9ac9b47528f8c2182991"
+  integrity sha512-7EwHUO2pc5P9IdhypZn2eqFL9rvcME3Xs7x8Uhp9N+Wqfmuzkf3IhZs9GgQf3Tk4h52j5ZNnS6yXy/bj7uHClA==
   dependencies:
     "@glimmer/env" "^0.1.7"
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
-    "@glimmer/validator" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
+    "@glimmer/validator" "^0.55.1"
 
-"@glimmer/runtime@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/runtime/-/runtime-0.54.2.tgz#149fe6a29f279785d6fbac6ec933036088f7a5e7"
-  integrity sha512-SwumHB0uw4/L6sgXmMTc4cf3GwYe8siFk7Qi2hVVTSZdZGrfIOP5ZB94x0HEWWeSUgy/4ar9TcsKvfj5LyLBvA==
+"@glimmer/runtime@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/runtime/-/runtime-0.55.1.tgz#cd79f451a2ff2b6d9aac74164752812415b7d149"
+  integrity sha512-t9J+tSSGq0KY2WoVhKaZkhmLWGlC7Hjosn43EiKPERf2x+wpkKkS/EGo6UHa0YjPIVnfFhWeY5C3fcVMZajKVw==
   dependencies:
     "@glimmer/env" "0.1.7"
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/low-level" "^0.54.2"
-    "@glimmer/program" "^0.54.2"
-    "@glimmer/reference" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
-    "@glimmer/validator" "^0.54.2"
-    "@glimmer/vm" "^0.54.2"
-    "@glimmer/wire-format" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/low-level" "^0.55.1"
+    "@glimmer/program" "^0.55.1"
+    "@glimmer/reference" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
+    "@glimmer/validator" "^0.55.1"
+    "@glimmer/vm" "^0.55.1"
+    "@glimmer/wire-format" "^0.55.1"
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/syntax@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.54.2.tgz#60d08458002c106791d4c5b648227ec0f29a1b2a"
-  integrity sha512-EpQGbbzfvBmeztc15SsriyAgD0aKgsxMOARVtW5buvCPw3dGYYNdSeyUJ3vInbrFGxkZLV390ht8VCbsDbqtlA==
+"@glimmer/syntax@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.55.1.tgz#adca96147e5c2b4e47a6ee8d8276effc4d31b6e5"
+  integrity sha512-QKW97Cl+Rz8dTWkYUewclLBRcyICg2Fb6BFz2oUDo17gP7w8eqb+XL8wAfzG1lDJ+WDT7pwprM8zUyvn2eYa5g==
   dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
     handlebars "^4.7.4"
     simple-html-tokenizer "^0.5.9"
 
-"@glimmer/util@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.54.2.tgz#211b027982006b6bcd393312cf474c7ee17922a0"
-  integrity sha512-ggJY3qayAxjiMuoToxxtwai+AI2KXrJSbOEvbvBV9K+IMykmdjhWGRWWEONnd9xJzQDlus5D9ROMypOEvsbS9w==
+"@glimmer/util@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.55.1.tgz#43657af0adde30ad1cb3a8d72c85a8af35de0194"
+  integrity sha512-F9Hr2hS/H738F2voG+W4Hx/4+W7uDeuqg7ddIPUecZP6HQHhqTbgGaQJIt5J1emJ1D4nLPpjSJpn50MVbVGeaQ==
   dependencies:
     "@glimmer/env" "0.1.7"
-    "@glimmer/interfaces" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/validator@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/validator/-/validator-0.54.2.tgz#9681ff89d9874a5b075c73bfc828ffc15b23c7df"
-  integrity sha512-D/BJo06+dSmjJuLchYK79Gj1kPHZ3K6qz5bOJn3FtOwftFa1XqW+1zbBYs4tqwbe3dHoRll4+t/X0Q4AXZpt7Q==
+"@glimmer/validator@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/validator/-/validator-0.55.1.tgz#c2ff4c8c9fd7e20d3df4bb98519eda840f8bc4ce"
+  integrity sha512-CX1Vb118xIjt0lYjBQvnAJo5lZIMaMg3Ef6cNQRM1gFqZkrh7sSs5Kz3hoxNxUtjiukRd2nfi+EirMhfcGgsWg==
   dependencies:
     "@glimmer/env" "^0.1.7"
 
-"@glimmer/vm@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/vm/-/vm-0.54.2.tgz#9a7e9c5839be0cd5d7b1495d06f369754686a750"
-  integrity sha512-LdvD8kqUT5VewGC52uhdGuJZlX/Mwm6/8sf/pRvI/4Cz0bZL+PMQQsX8IPdwGvftSu3wRIt33JWdrL+9tjPgAA==
+"@glimmer/vm@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/vm/-/vm-0.55.1.tgz#a8ae535de6ae6ebac6623da709b3f76097b84fa4"
+  integrity sha512-mui0Jf6H4R3U35Gy3viaipawPQbU0rqWf+49qwLALXHgZNtyhHzuLdcn41xVLNikAsRmvmVPbmczBN7uWiAZMw==
   dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
 
-"@glimmer/wire-format@^0.54.2":
-  version "0.54.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/wire-format/-/wire-format-0.54.2.tgz#aef5f618cbacd212359022df94393987d9e4a876"
-  integrity sha512-lmp9zW9Uo7CuNqpXJk2hxF7zLOkbr9fOjQKbSc3b+YletT0LhfNFRAs0R2WhQMlyw2UrNzc81+C0zt4wUdypkQ==
+"@glimmer/wire-format@^0.55.1":
+  version "0.55.1"
+  resolved "https://registry.yarnpkg.com/@glimmer/wire-format/-/wire-format-0.55.1.tgz#eff31e76225483ed3b5009639abdc050b7df3212"
+  integrity sha512-plDG2h5q0d/mz5Gzwtx+II/IVwPDIgXK9KsqITFqorQmxzOd2MoYY04nk3C7yN4bFdaqEl0P37rynfE63pgMqw==
   dependencies:
-    "@glimmer/interfaces" "^0.54.2"
-    "@glimmer/util" "^0.54.2"
+    "@glimmer/interfaces" "^0.55.1"
+    "@glimmer/util" "^0.55.1"
 
 "@simple-dom/document@^1.4.0":
   version "1.4.0"