diff --git a/package.json b/package.json
index 9fe957d7..e0a45a54 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,6 @@
   },
   "devDependencies": {
     "@types/jasmine": "^3.3.7",
-    "@types/memdown": "^3.0.0",
     "@typescript-eslint/eslint-plugin": "^2.19.2",
     "@typescript-eslint/parser": "^2.19.2",
     "eslint": "^6.8.0",
@@ -52,7 +51,6 @@
     "karma-jasmine-html-reporter": "^1.4",
     "karma-safari-launcher": "^1.0.0",
     "lerna": "^3.20.2",
-    "memdown": "^4.0.0",
     "prettier": "^1.19.1",
     "shx": "^0.3.2",
     "source-map-support": "^0.5.6",
diff --git a/yarn.lock b/yarn.lock
index 317957be..6bc759e0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1100,13 +1100,6 @@
     "@types/abstract-leveldown" "*"
     "@types/node" "*"
 
-"@types/memdown@^3.0.0":
-  version "3.0.0"
-  resolved "https://registry.yarnpkg.com/@types/memdown/-/memdown-3.0.0.tgz#2d909cb507afd341e3132d77dafa213347e47455"
-  integrity sha512-3VlN94b29j7/9XPGfy1kTPmyA5YfFiC0miQRpOCbCJOALy2ejM2IzgDB7fIBTYyf2isr1r8h3qbZmT/1RsCP9Q==
-  dependencies:
-    "@types/abstract-leveldown" "*"
-
 "@types/mime@*":
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
@@ -1371,14 +1364,6 @@ abbrev@1:
   resolved "https://registry.yarnpkg.com/abbrev/-/abbrev-1.1.1.tgz#f8f2c887ad10bf67f634f005b6987fed3179aac8"
   integrity sha512-nne9/IiQ/hzIhY6pdDnbBtz7DjPTKrY00P/zvPSm5pOFkl6xuGrGnXn/VtTNNfNtAfZ9/1RtehkszU9qcTii0Q==
 
-abstract-leveldown@~6.0.1:
-  version "6.0.3"
-  resolved "https://registry.yarnpkg.com/abstract-leveldown/-/abstract-leveldown-6.0.3.tgz#b4b6159343c74b0c5197b2817854782d8f748c4a"
-  integrity sha512-jzewKKpZbaYUa6HTThnrl+GrJhzjEAeuc7hTVpZdzg7kupXZFoqQDFwyOwLNbmJKJlmzw8yiipMPkDiuKkT06Q==
-  dependencies:
-    level-concat-iterator "~2.0.0"
-    xtend "~4.0.0"
-
 abstract-leveldown@~6.2.1:
   version "6.2.2"
   resolved "https://registry.yarnpkg.com/abstract-leveldown/-/abstract-leveldown-6.2.2.tgz#677425beeb28204367c7639e264e93ea4b49971a"
@@ -3683,7 +3668,7 @@ function-bind@^1.1.1:
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
   integrity sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A==
 
-functional-red-black-tree@^1.0.1, functional-red-black-tree@~1.0.1:
+functional-red-black-tree@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/functional-red-black-tree/-/functional-red-black-tree-1.0.1.tgz#1b0ab3bd553b2a0d6399d29c0e3ea0b252078327"
   integrity sha1-GwqzvVU7Kg1jmdKcDj6gslIHgyc=
@@ -4136,11 +4121,6 @@ ignore@^4.0.3, ignore@^4.0.6:
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-4.0.6.tgz#750e3db5862087b4737ebac8207ffd1ef27b25fc"
   integrity sha512-cyFDKrqc/YdcWFniJhzI42+AzS+gNwmUzOSFcRCQYwySuBBBy/KjuxWLZ/FHEH6Moq1NizMOBWyTcv8O4OZIMg==
 
-immediate@~3.2.3:
-  version "3.2.3"
-  resolved "https://registry.yarnpkg.com/immediate/-/immediate-3.2.3.tgz#d140fa8f614659bd6541233097ddaac25cdd991c"
-  integrity sha1-0UD6j2FGWb1lQSMwl92qwlzdmRw=
-
 import-fresh@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/import-fresh/-/import-fresh-2.0.0.tgz#d81355c15612d386c61f9ddd3922d4304822a546"
@@ -5105,11 +5085,6 @@ lru-cache@^5.1.1:
   dependencies:
     yallist "^3.0.2"
 
-ltgt@~2.2.0:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/ltgt/-/ltgt-2.2.1.tgz#f35ca91c493f7b73da0e07495304f17b31f87ee5"
-  integrity sha1-81ypHEk/e3PaDgdJUwTxezH4fuU=
-
 macos-release@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/macos-release/-/macos-release-2.3.0.tgz#eb1930b036c0800adebccd5f17bc4c12de8bb71f"
@@ -5209,18 +5184,6 @@ mem@^4.0.0:
     mimic-fn "^2.0.0"
     p-is-promise "^2.0.0"
 
-memdown@^4.0.0:
-  version "4.1.0"
-  resolved "https://registry.yarnpkg.com/memdown/-/memdown-4.1.0.tgz#4e667ec75ce524a8aa7391c10a5a357c6d4fde0e"
-  integrity sha512-RqDUWsJ3IH27+dHwBOg6/ZWJoGul+tesnaQ10Pr/ARx7GpskB01Ky0zNZ8EkM6lvQqXcxyzukmXA0T39XW2sRw==
-  dependencies:
-    abstract-leveldown "~6.0.1"
-    functional-red-black-tree "~1.0.1"
-    immediate "~3.2.3"
-    inherits "~2.0.1"
-    ltgt "~2.2.0"
-    safe-buffer "~5.1.1"
-
 memory-fs@^0.4.0, memory-fs@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/memory-fs/-/memory-fs-0.4.1.tgz#3a9a20b8462523e447cfbc7e8bb80ed667bfc552"