diff --git a/package.json b/package.json
index 6836acc906db4..0fcc88a6447be 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   "devDependencies": {
     "conventional-changelog-cli": "^2.0.31",
     "fs-extra": "^8.1.0",
-    "jsii-diff": "^0.22.0",
+    "jsii-diff": "^1.0.0",
     "jsii-pacmak": "^0.22.0",
     "jsii-rosetta": "^0.22.0",
     "lerna": "^3.20.2",
diff --git a/yarn.lock b/yarn.lock
index 2674947b150f9..04728200f7bcd 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1021,6 +1021,13 @@
   dependencies:
     jsonschema "^1.2.5"
 
+"@jsii/spec@^1.0.0":
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/@jsii/spec/-/spec-1.0.0.tgz#b5b9e0d67dad9b0e1e5e1e10e7724f67372b2870"
+  integrity sha512-suMnXDiLLaYg2oBycOIIKJ7ke0DrQOZFQgU4kK/5NEwnfI3YWKyv/VnXAs+QXXr9LYlOQMgkRhhEUyMMc3bBOw==
+  dependencies:
+    jsonschema "^1.2.5"
+
 "@lerna/add@3.20.0":
   version "3.20.0"
   resolved "https://registry.yarnpkg.com/@lerna/add/-/add-3.20.0.tgz#bea7edf36fc93fb72ec34cb9ba854c48d4abf309"
@@ -7011,15 +7018,15 @@ jsesc@~0.5.0:
   resolved "https://registry.yarnpkg.com/jsesc/-/jsesc-0.5.0.tgz#e7dee66e35d6fc16f710fe91d5cf69f70f08911d"
   integrity sha1-597mbjXW/Bb3EP6R1c9p9w8IkR0=
 
-jsii-diff@^0.22.0:
-  version "0.22.0"
-  resolved "https://registry.yarnpkg.com/jsii-diff/-/jsii-diff-0.22.0.tgz#952bb98fdd9fd027a98f3d852903473e52adaaae"
-  integrity sha512-bLMNaCqf0RwKYrpbufDAYttTapllK7YSJIaCKyhXE2vi13yHNbk5cmsOR0zwoh0/9YddTM1s0x8XUA5/hUdLjw==
+jsii-diff@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/jsii-diff/-/jsii-diff-1.0.0.tgz#565736ba6e8356c1f59384c7ba404ca9902b9d35"
+  integrity sha512-a66aIBStDZ8xgufrUBmAhKxPDjFnKUYKsxII0WEIiUbNjacG1La5CsBBwP5LWBbPZQcET63/ZZT/fmb/DC8jLQ==
   dependencies:
-    "@jsii/spec" "^0.22.0"
+    "@jsii/spec" "^1.0.0"
     fs-extra "^8.1.0"
-    jsii-reflect "^0.22.0"
-    log4js "^6.1.1"
+    jsii-reflect "^1.0.0"
+    log4js "^6.1.2"
     typescript "~3.7.5"
     yargs "^15.1.0"
 
@@ -7053,6 +7060,17 @@ jsii-reflect@^0.22.0:
     oo-ascii-tree "^0.22.0"
     yargs "^15.1.0"
 
+jsii-reflect@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/jsii-reflect/-/jsii-reflect-1.0.0.tgz#f948c84ea03c3d0da39e1456ab64f5617ea95d63"
+  integrity sha512-GW1cQ64TqcjGm8613ho6McOQVs4ZdMLCkPrnmHjblE6fa06kdlJbCEOCSjeZUMby9LB0h9tRaY0vzMDhDKw2rQ==
+  dependencies:
+    "@jsii/spec" "^1.0.0"
+    colors "^1.4.0"
+    fs-extra "^8.1.0"
+    oo-ascii-tree "^1.0.0"
+    yargs "^15.1.0"
+
 jsii-rosetta@^0.22.0:
   version "0.22.0"
   resolved "https://registry.yarnpkg.com/jsii-rosetta/-/jsii-rosetta-0.22.0.tgz#41e6353dfa52fc0868f64db97c793c69abdfbccc"
@@ -7454,7 +7472,7 @@ log-symbols@^2.2.0:
   dependencies:
     chalk "^2.0.1"
 
-log4js@^6.1.1:
+log4js@^6.1.1, log4js@^6.1.2:
   version "6.1.2"
   resolved "https://registry.yarnpkg.com/log4js/-/log4js-6.1.2.tgz#04688e1f4b8080c127b7dccb0db1c759cbb25dc4"
   integrity sha512-knS4Y30pC1e0n7rfx3VxcLOdBCsEo0o6/C7PVTGxdVK+5b1TYOSGQPn9FDcrhkoQBV29qwmA2mtkznPAQKnxQg==
@@ -8416,6 +8434,11 @@ oo-ascii-tree@^0.22.0:
   resolved "https://registry.yarnpkg.com/oo-ascii-tree/-/oo-ascii-tree-0.22.0.tgz#a2e9a959036cc20b803f05ae84b48f7495e1cbeb"
   integrity sha512-J+RleN39z6UHpmlyedLC93Sgx4SS2IYwmZ7kbNwmV3hbZ7ir0qXqpduAfEakjfHEfI1qPyppymZSdd5AwP8HcA==
 
+oo-ascii-tree@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/oo-ascii-tree/-/oo-ascii-tree-1.0.0.tgz#044ac58535cc70d330c5751c10d907c6e0ce0986"
+  integrity sha512-881ufRp1k77ZDObBjABZYgf6/EG8UXFaiZPZJILkwgeZp/xeXZDnBagHHn+rLCTc6dmyOKJf56iT7raK3nb47A==
+
 opener@^1.5.1:
   version "1.5.1"
   resolved "https://registry.yarnpkg.com/opener/-/opener-1.5.1.tgz#6d2f0e77f1a0af0032aca716c2c1fbb8e7e8abed"