diff --git a/CHANGELOG.md b/CHANGELOG.md
index e855275527..4c3159da39 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,23 @@
+## [26.4.2](https://github.com/kulshekhar/ts-jest/compare/v26.4.1...v26.4.2) (2020-10-23)
+
+
+### Features
+
+* **config:** expose several typings as public apis ([#2054](https://github.com/kulshekhar/ts-jest/issues/2054)) ([3b6b705](https://github.com/kulshekhar/ts-jest/commit/3b6b7055e2b9c74e81fb91596c807ace02ab77a1))
+
+
+### Performance Improvements
+
+* **compiler:** speed up bootstrap time for `isolatedModules:false` ([#2055](https://github.com/kulshekhar/ts-jest/issues/2055)) ([230b5dd](https://github.com/kulshekhar/ts-jest/commit/230b5ddbee55357d25dd190cd45aa8a30d7f31e0))
+
+
+### DEPRECATIONS
+
+* **config**: deprecate `tsConfig` in favor of `tsconfig` ([#1997](https://github.com/kulshekhar/ts-jest/pull/1997))
+* **config**: deprecate `packageJson` since internal codes don't use it anymore ([#2034](https://github.com/kulshekhar/ts-jest/pull/2034))
+
+
+
 ## [26.4.1](https://github.com/kulshekhar/ts-jest/compare/v26.4.0...v26.4.1) (2020-09-29)
 
 
diff --git a/package-lock.json b/package-lock.json
index 2f0534e471..e627d7b138 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-jest",
-  "version": "26.4.1",
+  "version": "26.4.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -2194,15 +2194,15 @@
       }
     },
     "@typescript-eslint/experimental-utils": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-4.4.0.tgz",
-      "integrity": "sha512-01+OtK/oWeSJTjQcyzDztfLF1YjvKpLFo+JZmurK/qjSRcyObpIecJ4rckDoRCSh5Etw+jKfdSzVEHevh9gJ1w==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/experimental-utils/-/experimental-utils-4.5.0.tgz",
+      "integrity": "sha512-bW9IpSAKYvkqDGRZzayBXIgPsj2xmmVHLJ+flGSoN0fF98pGoKFhbunIol0VF2Crka7z984EEhFi623Rl7e6gg==",
       "dev": true,
       "requires": {
         "@types/json-schema": "^7.0.3",
-        "@typescript-eslint/scope-manager": "4.4.0",
-        "@typescript-eslint/types": "4.4.0",
-        "@typescript-eslint/typescript-estree": "4.4.0",
+        "@typescript-eslint/scope-manager": "4.5.0",
+        "@typescript-eslint/types": "4.5.0",
+        "@typescript-eslint/typescript-estree": "4.5.0",
         "eslint-scope": "^5.0.0",
         "eslint-utils": "^2.0.0"
       }
@@ -2270,29 +2270,29 @@
       }
     },
     "@typescript-eslint/scope-manager": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.4.0.tgz",
-      "integrity": "sha512-r2FIeeU1lmW4K3CxgOAt8djI5c6Q/5ULAgdVo9AF3hPMpu0B14WznBAtxrmB/qFVbVIB6fSx2a+EVXuhSVMEyA==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/scope-manager/-/scope-manager-4.5.0.tgz",
+      "integrity": "sha512-C0cEO0cTMPJ/w4RA/KVe4LFFkkSh9VHoFzKmyaaDWAnPYIEzVCtJ+Un8GZoJhcvq+mPFXEsXa01lcZDHDG6Www==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/types": "4.4.0",
-        "@typescript-eslint/visitor-keys": "4.4.0"
+        "@typescript-eslint/types": "4.5.0",
+        "@typescript-eslint/visitor-keys": "4.5.0"
       }
     },
     "@typescript-eslint/types": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.4.0.tgz",
-      "integrity": "sha512-nU0VUpzanFw3jjX+50OTQy6MehVvf8pkqFcURPAE06xFNFenMj1GPEI6IESvp7UOHAnq+n/brMirZdR+7rCrlA==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/types/-/types-4.5.0.tgz",
+      "integrity": "sha512-n2uQoXnyWNk0Les9MtF0gCK3JiWd987JQi97dMSxBOzVoLZXCNtxFckVqt1h8xuI1ix01t+iMY4h4rFMj/303g==",
       "dev": true
     },
     "@typescript-eslint/typescript-estree": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.4.0.tgz",
-      "integrity": "sha512-Fh85feshKXwki4nZ1uhCJHmqKJqCMba+8ZicQIhNi5d5jSQFteWiGeF96DTjO8br7fn+prTP+t3Cz/a/3yOKqw==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/typescript-estree/-/typescript-estree-4.5.0.tgz",
+      "integrity": "sha512-gN1mffq3zwRAjlYWzb5DanarOPdajQwx5MEWkWCk0XvqC8JpafDTeioDoow2L4CA/RkYZu7xEsGZRhqrTsAG8w==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/types": "4.4.0",
-        "@typescript-eslint/visitor-keys": "4.4.0",
+        "@typescript-eslint/types": "4.5.0",
+        "@typescript-eslint/visitor-keys": "4.5.0",
         "debug": "^4.1.1",
         "globby": "^11.0.1",
         "is-glob": "^4.0.1",
@@ -2302,12 +2302,12 @@
       }
     },
     "@typescript-eslint/visitor-keys": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.4.0.tgz",
-      "integrity": "sha512-oBWeroUZCVsHLiWRdcTXJB7s1nB3taFY8WGvS23tiAlT6jXVvsdAV4rs581bgdEjOhn43q6ro7NkOiLKu6kFqA==",
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/@typescript-eslint/visitor-keys/-/visitor-keys-4.5.0.tgz",
+      "integrity": "sha512-UHq4FSa55NDZqscRU//O5ROFhHa9Hqn9KWTEvJGTArtTQp5GKv9Zqf6d/Q3YXXcFv4woyBml7fJQlQ+OuqRcHA==",
       "dev": true,
       "requires": {
-        "@typescript-eslint/types": "4.4.0",
+        "@typescript-eslint/types": "4.5.0",
         "eslint-visitor-keys": "^2.0.0"
       },
       "dependencies": {
@@ -10231,23 +10231,67 @@
       }
     },
     "string.prototype.trimend": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimend/-/string.prototype.trimend-1.0.1.tgz",
-      "integrity": "sha512-LRPxFUaTtpqYsTeNKaFOw3R4bxIzWOnbQ837QfBylo8jIxtcbK/A/sMV7Q+OAV/vWo+7s25pOE10KYSjaSO06g==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimend/-/string.prototype.trimend-1.0.2.tgz",
+      "integrity": "sha512-8oAG/hi14Z4nOVP0z6mdiVZ/wqjDtWSLygMigTzAb+7aPEDTleeFf+WrF+alzecxIRkckkJVn+dTlwzJXORATw==",
       "dev": true,
       "requires": {
         "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5"
+        "es-abstract": "^1.18.0-next.1"
+      },
+      "dependencies": {
+        "es-abstract": {
+          "version": "1.18.0-next.1",
+          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.18.0-next.1.tgz",
+          "integrity": "sha512-I4UGspA0wpZXWENrdA0uHbnhte683t3qT/1VFH9aX2dA5PPSf6QW5HHXf5HImaqPmjXaVeVk4RGWnaylmV7uAA==",
+          "dev": true,
+          "requires": {
+            "es-to-primitive": "^1.2.1",
+            "function-bind": "^1.1.1",
+            "has": "^1.0.3",
+            "has-symbols": "^1.0.1",
+            "is-callable": "^1.2.2",
+            "is-negative-zero": "^2.0.0",
+            "is-regex": "^1.1.1",
+            "object-inspect": "^1.8.0",
+            "object-keys": "^1.1.1",
+            "object.assign": "^4.1.1",
+            "string.prototype.trimend": "^1.0.1",
+            "string.prototype.trimstart": "^1.0.1"
+          }
+        }
       }
     },
     "string.prototype.trimstart": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.1.tgz",
-      "integrity": "sha512-XxZn+QpvrBI1FOcg6dIpxUPgWCPuNXvMD72aaRaUQv1eD4e/Qy8i/hFTe0BUmD60p/QA6bh1avmuPTfNjqVWRw==",
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.2.tgz",
+      "integrity": "sha512-7F6CdBTl5zyu30BJFdzSTlSlLPwODC23Od+iLoVH8X6+3fvDPPuBVVj9iaB1GOsSTSIgVfsfm27R2FGrAPznWg==",
       "dev": true,
       "requires": {
         "define-properties": "^1.1.3",
-        "es-abstract": "^1.17.5"
+        "es-abstract": "^1.18.0-next.1"
+      },
+      "dependencies": {
+        "es-abstract": {
+          "version": "1.18.0-next.1",
+          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.18.0-next.1.tgz",
+          "integrity": "sha512-I4UGspA0wpZXWENrdA0uHbnhte683t3qT/1VFH9aX2dA5PPSf6QW5HHXf5HImaqPmjXaVeVk4RGWnaylmV7uAA==",
+          "dev": true,
+          "requires": {
+            "es-to-primitive": "^1.2.1",
+            "function-bind": "^1.1.1",
+            "has": "^1.0.3",
+            "has-symbols": "^1.0.1",
+            "is-callable": "^1.2.2",
+            "is-negative-zero": "^2.0.0",
+            "is-regex": "^1.1.1",
+            "object-inspect": "^1.8.0",
+            "object-keys": "^1.1.1",
+            "object.assign": "^4.1.1",
+            "string.prototype.trimend": "^1.0.1",
+            "string.prototype.trimstart": "^1.0.1"
+          }
+        }
       }
     },
     "string_decoder": {
diff --git a/package.json b/package.json
index bf401cd38b..8762997660 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ts-jest",
-  "version": "26.4.1",
+  "version": "26.4.2",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "bin": "cli.js",