diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ffeefcf..d17992b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ['7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
+        php-versions: ['7.2', '7.3', '7.4', '8.0', '8.1', '8.2']
 
     runs-on: ${{ matrix.operating-system }}
 
@@ -28,4 +28,7 @@ jobs:
         run: composer install
 
       - name: Run tests
-        run: ./vendor/bin/phpunit
+        run: vendor/bin/phpunit
+
+      - name: Run tests
+        run: vendor/bin/phpstan
diff --git a/.mddoc.xml.dist b/.mddoc.xml.dist
index c1171a4..0d7d212 100644
--- a/.mddoc.xml.dist
+++ b/.mddoc.xml.dist
@@ -3,7 +3,7 @@
 		<section title="Quorum Stream Functions">
 			<badge-poser type="version"/>
 			<badge-poser type="license"/>
-			<badge-github-action name="QuorumCollection/StreamFunctions" workflow="CI"/>
+			<badge-github-action name="QuorumCollection/StreamFunctions" workflow-file="ci.yml"/>
 			<text>Useful functions for manipulating PHP streams (resources).</text>
 			<text>The general structure of these are inspired by a [talk given by Rob Pike](https://www.youtube.com/watch?v=HxaD_trXwRE).</text>
 
diff --git a/README.md b/README.md
index 56ec578..bdb39ae 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 [![Latest Stable Version](https://poser.pugx.org/quorum/stream-functions/version)](https://packagist.org/packages/quorum/stream-functions)
 [![License](https://poser.pugx.org/quorum/stream-functions/license)](https://packagist.org/packages/quorum/stream-functions)
-[![CI](https://github.com/QuorumCollection/StreamFunctions/workflows/CI/badge.svg?)](https://github.com/QuorumCollection/StreamFunctions/actions?query=workflow%3ACI)
+[![ci.yml](https://github.com/QuorumCollection/StreamFunctions/actions/workflows/ci.yml/badge.svg?)](https://github.com/QuorumCollection/StreamFunctions/actions/workflows/ci.yml)
 
 
 Useful functions for manipulating PHP streams (resources).
@@ -11,7 +11,7 @@ The general structure of these are inspired by a [talk given by Rob Pike](https:
 
 ## Requirements
 
-- **php**: ^7.1|^8.0
+- **php**: ^7.2|^8.0
 
 ## Installing
 
diff --git a/composer.json b/composer.json
index 022badb..5f36eaf 100644
--- a/composer.json
+++ b/composer.json
@@ -15,14 +15,18 @@
 		}
 	],
 	"require": {
-		"php": "^7.1|^8.0"
+		"php": "^7.2|^8.0"
 	},
 	"require-dev": {
+		"phpstan/phpstan": "^1.10",
 		"phpunit/phpunit": "~5|~9"
 	},
 	"autoload": {
 		"files": [
 			"src/streams.php"
 		]
+	},
+	"config": {
+		"sort-packages": true
 	}
 }
diff --git a/phpstan.neon b/phpstan.neon
new file mode 100644
index 0000000..aeb0535
--- /dev/null
+++ b/phpstan.neon
@@ -0,0 +1,5 @@
+parameters:
+	level: 6
+	paths:
+		- src
+		- test
diff --git a/src/streams.php b/src/streams.php
index 3b1b8b3..a4041be 100644
--- a/src/streams.php
+++ b/src/streams.php
@@ -36,8 +36,8 @@ function faccept( $stream, string ...$accept ) : ?string {
  *
  * The cursor is reset to its original position.
  *
- * @param resource $stream The stream to peek, must be a seekable resource
- * @param int      $length Up to length number of bytes read.
+ * @param resource   $stream The stream to peek, must be a seekable resource
+ * @param int $length Up to length number of bytes read.
  * @return string The peeked string of up to length bytes
  */
 function fpeek( $stream, int $length = 1 ) : string {
@@ -45,7 +45,7 @@ function fpeek( $stream, int $length = 1 ) : string {
 		throw new \InvalidArgumentException('Stream must be a resource');
 	}
 
-	$buf = fread($stream, $length);
+	$buf = fread($stream, $length) ?: '';
 	fseek($stream, 0 - strlen($buf), SEEK_CUR);
 
 	return $buf;
diff --git a/test/StreamsTest.php b/test/StreamsTest.php
index d50bb51..821d063 100644
--- a/test/StreamsTest.php
+++ b/test/StreamsTest.php
@@ -32,6 +32,7 @@ public function test_faccept_BOM() : void {
 
 	public function test_faccept_exception() : void {
 		$this->expectException(\InvalidArgumentException::class);
+		// @phpstan-ignore-next-line
 		faccept(123, 'test');
 	}
 
@@ -54,6 +55,7 @@ public function test_fpeek_empty() : void {
 
 	public function test_fpeek_exception() : void {
 		$this->expectException(\InvalidArgumentException::class);
+		// @phpstan-ignore-next-line
 		fpeek(123, 123);
 	}