diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f8127cea..e174455b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.12.13, 2.13.12, 3.3.1]
         java: [temurin@17]
     runs-on: ${{ matrix.os }}
@@ -61,7 +61,7 @@ jobs:
     if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v'))
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@17]
     runs-on: ${{ matrix.os }}
@@ -125,7 +125,7 @@ jobs:
     name: integration-kubernetes-v1-19
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
@@ -148,7 +148,7 @@ jobs:
     name: integration-kubernetes-v1-20
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
@@ -171,7 +171,7 @@ jobs:
     name: integration-kubernetes-v1-21
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
@@ -194,7 +194,7 @@ jobs:
     name: integration-kubernetes-v1-22
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
@@ -217,7 +217,7 @@ jobs:
     name: integration-kubernetes-v1-23
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
@@ -240,7 +240,7 @@ jobs:
     name: integration-kubernetes-v1-24
     strategy:
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-22.04]
         scala: [2.13.12]
         java: [temurin@8]
     runs-on: ${{ matrix.os }}
diff --git a/client/src/main/scala/skuber/json/package.scala b/client/src/main/scala/skuber/json/package.scala
index 6a212f80..fefc0530 100644
--- a/client/src/main/scala/skuber/json/package.scala
+++ b/client/src/main/scala/skuber/json/package.scala
@@ -395,9 +395,7 @@ package object format {
       }
       jsResult match {
         case JsSuccess(_, _) => jsResult
-        case JsError(_) => Json.fromJson[Int](json).flatMap {
-          s => JsSuccess(Resource.Quantity(s.toString))
-        }
+        case JsError(_) => JsSuccess(Resource.Quantity(json.toString()))
       }
     }
 
diff --git a/client/src/test/scala/skuber/model/ResourceSpec.scala b/client/src/test/scala/skuber/model/ResourceSpec.scala
index d0b83436..7a77da48 100644
--- a/client/src/test/scala/skuber/model/ResourceSpec.scala
+++ b/client/src/test/scala/skuber/model/ResourceSpec.scala
@@ -1,7 +1,8 @@
 package skuber
 
-import org.specs2.mutable.Specification // for unit-style testing
-
+import org.specs2.mutable.Specification
+import play.api.libs.json.{JsResult, Json}
+import skuber.Resource.Quantity
 import scala.math.BigInt
 
 
@@ -59,5 +60,19 @@ class ResourceSpec extends Specification {
         badVal must throwAn[Exception] 
       }
   }
+
+  "A resource quantity json formatter\n" >> {
+    "where quantity json formatter should accpet different types" >> {
+      val jsonString = """[1.3, "1.2", "50m", "1Mi", 1, "2"]"""
+      // Parse the JSON
+      val json = Json.parse(jsonString)
+      // Deserialize into ResourceList
+      import skuber.json.format.quantityFormat
+      val result: JsResult[List[Quantity]] = Json.fromJson[List[Quantity]](json)
+      val amountList = result.get.map(_.amount)
+
+      amountList mustEqual List(1.3, 1.2, 0.05, 1048576, 1, 2)
+    }
+  }
     
 }
\ No newline at end of file