diff --git a/packages/cli/package.json b/packages/cli/package.json
index 5e88dc193..c911b4b11 100644
--- a/packages/cli/package.json
+++ b/packages/cli/package.json
@@ -82,7 +82,7 @@
     "npm-programmatic": "0.0.12",
     "rlp": "^2.2.3",
     "semver": "^5.5.0",
-    "simple-git": "^1.110.0",
+    "simple-git": "^3.5.0",
     "solc-wrapper": "^0.6.3",
     "spinnies": "^0.3.0",
     "toposort": "^2.0.2",
diff --git a/yarn.lock b/yarn.lock
index 535941c5b..e03347472 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -437,6 +437,18 @@
     lodash.camelcase "^4.3.0"
     protobufjs "^6.8.6"
 
+"@kwsites/file-exists@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@kwsites/file-exists/-/file-exists-1.1.1.tgz#ad1efcac13e1987d8dbaf235ef3be5b0d96faa99"
+  integrity sha512-m9/5YGR18lIwxSFDwfE3oA7bWuq9kdau6ugN4H2rJeyhFQZcG9AgSHkQtSD15a8WvTgfz9aikZMrKPHvbpqFiw==
+  dependencies:
+    debug "^4.1.1"
+
+"@kwsites/promise-deferred@^1.1.1":
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/@kwsites/promise-deferred/-/promise-deferred-1.1.1.tgz#8ace5259254426ccef57f3175bc64ed7095ed919"
+  integrity sha512-GaHYm+c0O9MjZRu0ongGBRbinu8gVAMd2UZjji6jVmqKtZluZnptXGWhz1E8j8D2HJ3f/yMxKAUC0b+57wncIw==
+
 "@lerna/add@3.18.0":
   version "3.18.0"
   resolved "https://registry.yarnpkg.com/@lerna/add/-/add-3.18.0.tgz#86e38f14d7a0a7c61315dccb402377feb1c9db83"
@@ -3944,11 +3956,12 @@ debug@3.2.6, debug@^3.0.1, debug@^3.1.0, debug@^3.2.6:
   dependencies:
     ms "^2.1.1"
 
-debug@^4.0.1, debug@^4.1.0, debug@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
+debug@^4.0.1, debug@^4.1.0, debug@^4.1.1, debug@^4.3.3:
+  version "4.3.4"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.3.4.tgz#1319f6579357f2338d3337d2cdd4914bb5dcc865"
+  integrity sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==
   dependencies:
-    ms "^2.1.1"
+    ms "2.1.2"
 
 debuglog@^1.0.1:
   version "1.0.1"
@@ -7869,7 +7882,7 @@ mock-fs@^4.1.0:
 "mock-stdlib-libdeps@file:./packages/cli/mocks/mock-stdlib-libdeps":
   version "1.1.0"
 
-"mock-stdlib-root@file:./packages/cli/mocks/mock-stdlib":
+"mock-stdlib-root@file:./packages/cli/mocks/mock-stdlib", "mock-stdlib@file:./packages/cli/mocks/mock-stdlib":
   version "1.1.0"
 
 "mock-stdlib-undeployed-2@file:./packages/cli/mocks/mock-stdlib-undeployed-2":
@@ -7884,9 +7897,6 @@ mock-fs@^4.1.0:
 "mock-stdlib-unsupported@file:./packages/cli/mocks/mock-stdlib-unsupported":
   version "1.1.0"
 
-"mock-stdlib@file:./packages/cli/mocks/mock-stdlib":
-  version "1.1.0"
-
 "mock-stdlib@file:tests/cli/dependencies/mock-stdlib-1.1.0":
   version "1.1.0"
 
@@ -7924,7 +7934,7 @@ ms@2.1.1:
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.1.tgz#30a5864eb3ebb0a66f2ebe6d727af06a09d86e0a"
 
-ms@^2.0.0, ms@^2.1.1:
+ms@2.1.2, ms@^2.0.0, ms@^2.1.1:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.2.tgz#d09d1f357b443f493382a8eb3ccd183872ae6009"
 
@@ -9828,11 +9838,14 @@ simple-get@^2.7.0:
     once "^1.3.1"
     simple-concat "^1.0.0"
 
-simple-git@^1.110.0:
-  version "1.126.0"
-  resolved "https://registry.yarnpkg.com/simple-git/-/simple-git-1.126.0.tgz#0c345372275139c8433b8277f4b3e155092aa434"
+simple-git@^3.5.0:
+  version "3.5.0"
+  resolved "https://registry.yarnpkg.com/simple-git/-/simple-git-3.5.0.tgz#3c3538f4d7a1b3c8f3904412b12740bdcad9c8b1"
+  integrity sha512-fZsaq5nzdxQRhMNs6ESGLpMUHoL5GRP+boWPhq9pMYMKwOGZV2jHOxi8AbFFA2Y/6u4kR99HoULizSbpzaODkA==
   dependencies:
-    debug "^4.0.1"
+    "@kwsites/file-exists" "^1.1.1"
+    "@kwsites/promise-deferred" "^1.1.1"
+    debug "^4.3.3"
 
 sinon-chai@^3.2.0, sinon-chai@^3.3.0:
   version "3.3.0"