diff --git a/package.json b/package.json
index 84df3f1..49814dd 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "pre-commit": "^1.2.2",
     "rdf-test-suite": "^1.13.1",
     "streamify-string": "^1.0.1",
-    "ts-jest": "^25.1.0",
+    "ts-jest": "^26.0.0",
     "tslint": "^6.0.0",
     "tslint-eslint-rules": "^5.3.1",
     "typescript": "^3.3.1"
diff --git a/yarn.lock b/yarn.lock
index 4e9a465..a56524a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3619,7 +3619,7 @@ resolve-url@^0.2.1:
   resolved "https://registry.yarnpkg.com/resolve-url/-/resolve-url-0.2.1.tgz#2c637fe77c893afd2a663fe21aa9080068e2052a"
   integrity sha1-LGN/53yJOv0qZj/iGqkIAGjiBSo=
 
-resolve@1.x, resolve@^1.10.0, resolve@^1.17.0, resolve@^1.3.2:
+resolve@^1.10.0, resolve@^1.17.0, resolve@^1.3.2:
   version "1.17.0"
   resolved "https://registry.yarnpkg.com/resolve/-/resolve-1.17.0.tgz#b25941b54968231cc2d1bb76a79cb7f2c0bf8444"
   integrity sha512-ic+7JYiV8Vi2yzQGFWOkiZD5Z9z7O2Zhm9XMaTxdJExKasieFCr+yXZ/WmXsckHiKl12ar0y6XiXDx3m4RHn1w==
@@ -3705,16 +3705,16 @@ saxes@^5.0.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@6.x, semver@^6.0.0, semver@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
-  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
-
-semver@^7.2.1, semver@^7.3.2:
+semver@7.x, semver@^7.2.1, semver@^7.3.2:
   version "7.3.2"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.2.tgz#604962b052b81ed0786aae84389ffba70ffd3938"
   integrity sha512-OrOb32TeeambH6UrhtShmF7CRDqhL6/5XpPNp2DuRH6+9QLw/orhp72j87v8Qa1ScDkvrrBNpZcDejAirJmfXQ==
 
+semver@^6.0.0, semver@^6.3.0:
+  version "6.3.0"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
+
 set-blocking@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
@@ -4171,10 +4171,10 @@ trim-newlines@^2.0.0:
   resolved "https://registry.yarnpkg.com/trim-newlines/-/trim-newlines-2.0.0.tgz#b403d0b91be50c331dfc4b82eeceb22c3de16d20"
   integrity sha1-tAPQuRvlDDMd/EuC7s6yLD3hbSA=
 
-ts-jest@^25.1.0:
-  version "25.4.0"
-  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-25.4.0.tgz#5ad504299f8541d463a52e93e5e9d76876be0ba4"
-  integrity sha512-+0ZrksdaquxGUBwSdTIcdX7VXdwLIlSRsyjivVA9gcO+Cvr6ByqDhu/mi5+HCcb6cMkiQp5xZ8qRO7/eCqLeyw==
+ts-jest@^26.0.0:
+  version "26.0.0"
+  resolved "https://registry.yarnpkg.com/ts-jest/-/ts-jest-26.0.0.tgz#957b802978249aaf74180b9dcb17b4fd787ad6f3"
+  integrity sha512-eBpWH65mGgzobuw7UZy+uPP9lwu+tPp60o324ASRX4Ijg8UC5dl2zcge4kkmqr2Zeuk9FwIjvCTOPuNMEyGWWw==
   dependencies:
     bs-logger "0.x"
     buffer-from "1.x"
@@ -4184,8 +4184,7 @@ ts-jest@^25.1.0:
     make-error "1.x"
     micromatch "4.x"
     mkdirp "1.x"
-    resolve "1.x"
-    semver "6.x"
+    semver "7.x"
     yargs-parser "18.x"
 
 tslib@1.9.0: