diff --git a/composer.json b/composer.json
index 1cff30a..7e1dadc 100644
--- a/composer.json
+++ b/composer.json
@@ -43,7 +43,7 @@
         "amphp/process": "^2",
         "phpunit/phpunit": "^9",
         "amphp/php-cs-fixer-config": "^2",
-        "psalm/phar": "^5.4"
+        "psalm/phar": "5.22"
     },
     "autoload": {
         "psr-4": {
diff --git a/psalm.xml b/psalm.xml
index fafdc33..ebc5bde 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -14,6 +14,12 @@
     </projectFiles>
 
     <issueHandlers>
+        <RiskyTruthyFalsyComparison>
+            <errorLevel type="suppress">
+                <directory name="src"/>
+            </errorLevel>
+        </RiskyTruthyFalsyComparison>
+
         <UnsupportedPropertyReferenceUsage>
             <errorLevel type="suppress">
                 <directory name="src"/>
diff --git a/src/Protocol/RespParser.php b/src/Protocol/RespParser.php
index ffda29a..64cd4e2 100644
--- a/src/Protocol/RespParser.php
+++ b/src/Protocol/RespParser.php
@@ -5,7 +5,6 @@
 use Amp\ForbidCloning;
 use Amp\ForbidSerialization;
 use Amp\Parser\Parser;
-use Generator as ParserGeneratorType;
 
 /**
  * @psalm-type ParserGeneratorType = \Generator<int, int|string, string, RedisResponse>