diff --git a/api/filters/annotations/annotations_test.go b/api/filters/annotations/annotations_test.go
index ee895ef9c..3f4fb9562 100644
--- a/api/filters/annotations/annotations_test.go
+++ b/api/filters/annotations/annotations_test.go
@@ -150,6 +150,42 @@ metadata:
 				"2":     "ford",
 			}},
 		},
+
+		// test quoting of values which are not considered strings in yaml 1.1
+		"yaml_1_1_compatibility": {
+			input: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: instance
+  annotations:
+    hero: batman
+    fiend: riddler
+`,
+			expectedOutput: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: instance
+  annotations:
+    hero: batman
+    fiend: riddler
+    a: "y"
+    b: y1
+    c: "yes"
+    d: yes1
+    e: "true"
+    f: true1
+`,
+			filter: Filter{Annotations: annoMap{
+				"a": "y",
+				"b": "y1",
+				"c": "yes",
+				"d": "yes1",
+				"e": "true",
+				"f": "true1",
+			}},
+		},
 	}
 
 	for tn, tc := range testCases {
diff --git a/api/filters/fsslice/fsslice.go b/api/filters/fsslice/fsslice.go
index 5c171a90b..e783c2860 100644
--- a/api/filters/fsslice/fsslice.go
+++ b/api/filters/fsslice/fsslice.go
@@ -20,14 +20,18 @@ func SetScalar(value string) SetFn {
 
 // SetEntry returns a SetFn to set an entry in a map
 func SetEntry(key, value, tag string) SetFn {
+	n := &yaml.Node{
+		Kind:  yaml.ScalarNode,
+		Value: value,
+		Tag:   tag,
+	}
+	if tag == yaml.StringTag && yaml.IsYaml1_1NonString(n) {
+		n.Style = yaml.DoubleQuotedStyle
+	}
 	return func(node *yaml.RNode) error {
 		return node.PipeE(yaml.FieldSetter{
-			Name: key,
-			Value: yaml.NewRNode(&yaml.Node{
-				Kind:  yaml.ScalarNode,
-				Value: value,
-				Tag:   tag,
-			}),
+			Name:  key,
+			Value: yaml.NewRNode(n),
 		})
 	}
 
diff --git a/api/filters/labels/labels_test.go b/api/filters/labels/labels_test.go
index 878655406..46ffd3233 100644
--- a/api/filters/labels/labels_test.go
+++ b/api/filters/labels/labels_test.go
@@ -326,6 +326,50 @@ metadata:
 				},
 			},
 		},
+
+		// test quoting of values which are not considered strings in yaml 1.1
+		"yaml_1_1_compatibility": {
+			input: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: instance
+  labels:
+    hero: batman
+    fiend: riddler
+`,
+			expectedOutput: `
+apiVersion: example.com/v1
+kind: Foo
+metadata:
+  name: instance
+  labels:
+    hero: batman
+    fiend: riddler
+    a: "y"
+    b: y1
+    c: "yes"
+    d: yes1
+    e: "true"
+    f: true1
+`,
+			filter: Filter{
+				Labels: labelMap{
+					"a": "y",
+					"b": "y1",
+					"c": "yes",
+					"d": "yes1",
+					"e": "true",
+					"f": "true1",
+				},
+				FsSlice: []types.FieldSpec{
+					{
+						Path:               "metadata/labels",
+						CreateIfNotPresent: true,
+					},
+				},
+			},
+		},
 	}
 
 	for tn, tc := range testCases {