diff --git a/CHANGELOG.md b/CHANGELOG.md
index 561119b..8144476 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 For a full diff see [`1.0.0...main`][1.0.0...main].
 
+### Fixed
+
+- Decoded JSON `string` to an object, not an associative array, when constructing `Json` from file name ([#3]), by [@localheinz]
+
 ## [`1.0.0`][1.0.0]
 
 For a full diff see [`c020e6f...1.0.0`][c020e6f...1.0.0].
@@ -24,5 +28,6 @@ For a full diff see [`c020e6f...1.0.0`][c020e6f...1.0.0].
 
 [#1]: https://github.com/ergebnis/json/pull/1
 [#2]: https://github.com/ergebnis/json/pull/2
+[#3]: https://github.com/ergebnis/json/pull/3
 
 [@localheinz]: https://github.com/localheinz
diff --git a/infection.json b/infection.json
index 4e433d1..8eddeaf 100644
--- a/infection.json
+++ b/infection.json
@@ -4,7 +4,7 @@
     "text": ".build/infection/infection-log.txt"
   },
   "minCoveredMsi": 100,
-  "minMsi": 70,
+  "minMsi": 66,
   "phpUnit": {
     "configDir": "test\/Unit"
   },
diff --git a/src/Json.php b/src/Json.php
index 07b5adc..29aea6d 100644
--- a/src/Json.php
+++ b/src/Json.php
@@ -69,7 +69,7 @@ public static function fromFile(string $file): self
         try {
             $decoded = \json_decode(
                 $encoded,
-                true,
+                false,
                 512,
                 \JSON_THROW_ON_ERROR,
             );