diff --git a/Sources/Extensions/FoundationExtensions.swift b/Sources/Extensions/FoundationExtensions.swift
index c61257e..0d33f35 100755
--- a/Sources/Extensions/FoundationExtensions.swift
+++ b/Sources/Extensions/FoundationExtensions.swift
@@ -138,7 +138,8 @@ internal extension URLRequest {
                 let cfEncoding = CFStringConvertNSStringEncodingToEncoding(value.rawValue)
                 representaion = CFStringConvertEncodingToIANACharSetName(cfEncoding) as String? ?? "*"
             }
-            return "\(representaion); q=\(quality)"
+            let qualityDesc = String(format: "%.1f", quality)
+            return "\(representaion); q=\(qualityDesc)"
         }
     }