diff --git a/src/NJsonSchema.CodeGeneration.CSharp/NJsonSchema.CodeGeneration.CSharp.csproj b/src/NJsonSchema.CodeGeneration.CSharp/NJsonSchema.CodeGeneration.CSharp.csproj
index aea22d96f..f3704b63d 100644
--- a/src/NJsonSchema.CodeGeneration.CSharp/NJsonSchema.CodeGeneration.CSharp.csproj
+++ b/src/NJsonSchema.CodeGeneration.CSharp/NJsonSchema.CodeGeneration.CSharp.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.3;netstandard2.0;net451</TargetFrameworks>
     <Description>JSON Schema reader, generator and validator for .NET</Description>
-    <Version>9.13.20</Version>
+    <Version>9.13.21</Version>
     <PackageTags>json schema validation generator .net</PackageTags>
     <Copyright>Copyright © Rico Suter, 2018</Copyright>
     <PackageLicenseUrl>https://github.com/rsuter/NJsonSchema/blob/master/LICENSE.md</PackageLicenseUrl>
diff --git a/src/NJsonSchema.CodeGeneration.TypeScript/NJsonSchema.CodeGeneration.TypeScript.csproj b/src/NJsonSchema.CodeGeneration.TypeScript/NJsonSchema.CodeGeneration.TypeScript.csproj
index ae01cf0dd..8eee1df11 100644
--- a/src/NJsonSchema.CodeGeneration.TypeScript/NJsonSchema.CodeGeneration.TypeScript.csproj
+++ b/src/NJsonSchema.CodeGeneration.TypeScript/NJsonSchema.CodeGeneration.TypeScript.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.3;netstandard2.0;net451</TargetFrameworks>
     <Description>JSON Schema reader, generator and validator for .NET</Description>
-    <Version>9.13.20</Version>
+    <Version>9.13.21</Version>
     <PackageTags>json schema validation generator .net</PackageTags>
     <Copyright>Copyright © Rico Suter, 2018</Copyright>
     <PackageLicenseUrl>https://github.com/rsuter/NJsonSchema/blob/master/LICENSE.md</PackageLicenseUrl>
diff --git a/src/NJsonSchema.CodeGeneration.TypeScript/TypeScriptValueGenerator.cs b/src/NJsonSchema.CodeGeneration.TypeScript/TypeScriptValueGenerator.cs
index c623d5157..6d10dc768 100644
--- a/src/NJsonSchema.CodeGeneration.TypeScript/TypeScriptValueGenerator.cs
+++ b/src/NJsonSchema.CodeGeneration.TypeScript/TypeScriptValueGenerator.cs
@@ -13,7 +13,7 @@ namespace NJsonSchema.CodeGeneration.TypeScript
     /// <summary>Converts the default value to a TypeScript identifier.</summary>
     public class TypeScriptValueGenerator : ValueGeneratorBase
     {
-        private readonly List<string> _formatCompatibleWithString = new List<string>()
+        private readonly List<string> _supportedFormatStrings = new List<string>()
         {
             JsonFormatStrings.Uri,
             JsonFormatStrings.Guid,
@@ -42,9 +42,9 @@ public override string GetDefaultValue(JsonSchema4 schema, bool allowsNull, stri
             var value = base.GetDefaultValue(schema, allowsNull, targetType, typeNameHint, useSchemaDefault, typeResolver);
             if (value == null)
             {
-                if (schema.Type.HasFlag(JsonObjectType.String) && _formatCompatibleWithString.Contains(schema.Format))
+                if (schema.Type.HasFlag(JsonObjectType.String) && _supportedFormatStrings.Contains(schema.Format))
                 {
-                    return "\"" + ConversionUtilities.ConvertToStringLiteral(value.ToString()) + "\"";
+                    return GetDefaultAsStringLiteral(schema);
                 }
 
                 var isOptional = (schema as JsonProperty)?.IsRequired == false;
diff --git a/src/NJsonSchema.CodeGeneration/NJsonSchema.CodeGeneration.csproj b/src/NJsonSchema.CodeGeneration/NJsonSchema.CodeGeneration.csproj
index 6407d29b5..5264def09 100644
--- a/src/NJsonSchema.CodeGeneration/NJsonSchema.CodeGeneration.csproj
+++ b/src/NJsonSchema.CodeGeneration/NJsonSchema.CodeGeneration.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.3;netstandard2.0;net451</TargetFrameworks>
     <Description>JSON Schema reader, generator and validator for .NET</Description>
-    <Version>9.13.20</Version>
+    <Version>9.13.21</Version>
     <PackageTags>json schema validation generator .net</PackageTags>
     <Copyright>Copyright © Rico Suter, 2018</Copyright>
     <PackageLicenseUrl>https://github.com/rsuter/NJsonSchema/blob/master/LICENSE.md</PackageLicenseUrl>
diff --git a/src/NJsonSchema.CodeGeneration/ValueGeneratorBase.cs b/src/NJsonSchema.CodeGeneration/ValueGeneratorBase.cs
index 52ddd4eaf..3ef2475e6 100644
--- a/src/NJsonSchema.CodeGeneration/ValueGeneratorBase.cs
+++ b/src/NJsonSchema.CodeGeneration/ValueGeneratorBase.cs
@@ -17,7 +17,7 @@ namespace NJsonSchema.CodeGeneration
     public abstract class ValueGeneratorBase
     {
         private readonly CodeGeneratorSettingsBase _settings;
-        private readonly List<string> _formatNotCompatibleWithString = new List<string>()
+        private readonly List<string> _unsupportedFormatStrings = new List<string>()
         {
             JsonFormatStrings.Date,
             JsonFormatStrings.DateTime,
@@ -54,28 +54,30 @@ public virtual string GetDefaultValue(JsonSchema4 schema, bool allowsNull, strin
 
             var actualSchema = schema is JsonProperty ? ((JsonProperty)schema).ActualTypeSchema : schema.ActualSchema;
             if (actualSchema.IsEnumeration && !actualSchema.Type.HasFlag(JsonObjectType.Object) && actualSchema.Type != JsonObjectType.None)
+            {
                 return GetEnumDefaultValue(schema, actualSchema, typeNameHint, typeResolver);
+            }
+
+            if (schema.Type.HasFlag(JsonObjectType.String) && _unsupportedFormatStrings.Contains(schema.Format) == false)
+            {
+                return GetDefaultAsStringLiteral(schema);
+            }
+            // TODO: Add conversion for format string, e.g. in C# DateTime.Parse()
 
-            if (schema.Type.HasFlag(JsonObjectType.String))
-                return GetStringValue(schema.Type, schema.Default, schema.Format);
-                
             if (schema.Type.HasFlag(JsonObjectType.Boolean))
+            {
                 return schema.Default.ToString().ToLowerInvariant();
+            }
+
             if (schema.Type.HasFlag(JsonObjectType.Integer) ||
                 schema.Type.HasFlag(JsonObjectType.Number))
+            {
                 return GetNumericValue(schema.Type, schema.Default, schema.Format);
+            }
 
             return null;
         }
 
-        private string GetStringValue(JsonObjectType type, object value, string format)
-        {
-            if(!_formatNotCompatibleWithString.Contains(format))
-                return "\"" + ConversionUtilities.ConvertToStringLiteral(value.ToString()) + "\"";
-            else
-                return null;
-        }
-
         /// <summary>Converts the default value to a number literal. </summary>
         /// <param name="type">The JSON type.</param>
         /// <param name="value">The value to convert.</param>
@@ -101,6 +103,14 @@ protected virtual string GetEnumDefaultValue(JsonSchema4 schema, JsonSchema4 act
             return typeName + "." + _settings.EnumNameGenerator.Generate(index, enumName, schema.Default, actualSchema);
         }
 
+        /// <summary>Gets the default value as string literal.</summary>
+        /// <param name="schema">The schema.</param>
+        /// <returns>The string literal.</returns>
+        protected string GetDefaultAsStringLiteral(JsonSchema4 schema)
+        {
+            return "\"" + ConversionUtilities.ConvertToStringLiteral(schema.Default.ToString()) + "\"";
+        }
+
         /// <summary>Converts a number to its string representation.</summary>
         /// <param name="value">The value.</param>
         /// <returns>The string.</returns>
diff --git a/src/NJsonSchema.Yaml/NJsonSchema.Yaml.csproj b/src/NJsonSchema.Yaml/NJsonSchema.Yaml.csproj
index f939d44ae..5e0cfa1af 100644
--- a/src/NJsonSchema.Yaml/NJsonSchema.Yaml.csproj
+++ b/src/NJsonSchema.Yaml/NJsonSchema.Yaml.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.3;netstandard2.0;net45</TargetFrameworks>
     <Description>JSON Schema reader, generator and validator for .NET</Description>
-    <Version>9.13.20</Version>
+    <Version>9.13.21</Version>
     <PackageTags>json schema validation generator .net</PackageTags>
     <Copyright>Copyright © Rico Suter, 2018</Copyright>
     <PackageLicenseUrl>https://github.com/rsuter/NJsonSchema/blob/master/LICENSE.md</PackageLicenseUrl>
diff --git a/src/NJsonSchema/NJsonSchema.csproj b/src/NJsonSchema/NJsonSchema.csproj
index 00b7fef3c..8b5ed074a 100644
--- a/src/NJsonSchema/NJsonSchema.csproj
+++ b/src/NJsonSchema/NJsonSchema.csproj
@@ -2,7 +2,7 @@
   <PropertyGroup>
     <TargetFrameworks>netstandard1.0;netstandard2.0;net40;net45</TargetFrameworks>
     <Description>JSON Schema reader, generator and validator for .NET</Description>
-    <Version>9.13.20</Version>
+    <Version>9.13.21</Version>
     <PackageTags>json schema validation generator .net</PackageTags>
     <Copyright>Copyright © Rico Suter, 2018</Copyright>
     <PackageLicenseUrl>https://github.com/rsuter/NJsonSchema/blob/master/LICENSE.md</PackageLicenseUrl>