diff --git a/package.json b/package.json
index c41ed5c4..2526a3bd 100755
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "dependencies": {
         "minimal-polyfills": "^2.2.3",
         "run-exclusive": "^2.2.19",
-        "tsafe": "^1.6.6"
+        "tsafe": "^1.8.5"
     },
     "files": [
         "src/",
diff --git a/src/lib/Ctx.ts b/src/lib/Ctx.ts
index 5693aeea..1b682be8 100644
--- a/src/lib/Ctx.ts
+++ b/src/lib/Ctx.ts
@@ -2,8 +2,7 @@
 import { Polyfill as Set } from "minimal-polyfills/Set";
 // @denoify-line-ignore
 import { Polyfill as WeakMap } from "minimal-polyfills/WeakMap";
-import { assert } from "tsafe/assert";;
-import { is } from "tsafe/is";
+import { assert, is } from "tsafe/assert";
 import { LazyEvt } from "./LazyEvt";
 import { importProxy } from "./importProxy";
 import { overwriteReadonlyProp } from "tsafe/lab/overwriteReadonlyProp";
diff --git a/src/lib/Evt.from.ts b/src/lib/Evt.from.ts
index 540347d0..8c6ec193 100644
--- a/src/lib/Evt.from.ts
+++ b/src/lib/Evt.from.ts
@@ -1,5 +1,5 @@
 import { id } from "tsafe/id";
-import { assert } from "tsafe/assert";;
+import { assert } from "tsafe/assert";
 import { typeGuard } from "tsafe/typeGuard";
 import { mergeImpl } from "./Evt.merge";
 import { importProxy } from "./importProxy";
diff --git a/src/tools/reducers/partition.ts b/src/tools/reducers/partition.ts
index 07512f08..99efc8ee 100644
--- a/src/tools/reducers/partition.ts
+++ b/src/tools/reducers/partition.ts
@@ -1,5 +1,4 @@
-import { assert } from "tsafe/assert";
-import { is } from "tsafe/is";
+import { assert, is } from "tsafe/assert";
 import { ReduceArguments, toReduceArguments } from "./reduceify";
 
 function arrPartitionImpl<ArrOf, U extends ArrOf>(
diff --git a/yarn.lock b/yarn.lock
index aeba7b91..470801a7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -74,10 +74,10 @@ rxjs@^6.5.4:
   dependencies:
     tslib "^1.9.0"
 
-tsafe@^1.6.6:
-  version "1.6.6"
-  resolved "https://registry.yarnpkg.com/tsafe/-/tsafe-1.6.6.tgz#fd93e64d6eb13ef83ed1650669cc24bad4f5df9f"
-  integrity sha512-gzkapsdbMNwBnTIjgO758GujLCj031IgHK/PKr2mrmkCSJMhSOR5FeOuSxKLMUoYc0vAA4RGEYYbjt/v6afD3g==
+tsafe@^1.8.5:
+  version "1.8.5"
+  resolved "https://registry.yarnpkg.com/tsafe/-/tsafe-1.8.5.tgz#cdf9fa3111974ac480d7ee519f8241815e5d22ea"
+  integrity sha512-LFWTWQrW6rwSY+IBNFl2ridGfUzVsPwrZ26T4KUJww/py8rzaQ/SY+MIz6YROozpUCaRcuISqagmlwub9YT9kw==
 
 tslib@^1.9.0:
   version "1.14.1"