diff --git a/src/index.ts b/src/index.ts
index 98c7d0b..4ed66bf 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -66,7 +66,7 @@ function toPythonTypeX(type: XtpNormalizedType, required: boolean = true): strin
 
 
 function toPythonType(property: XtpTyped, required?: boolean): string {
-  return toPythonTypeX(property.xtpType, required === true ? true : false);
+  return toPythonTypeX(property.xtpType, required === false ? false : true);
 }
 
 function toPythonParamType(property: XtpTyped, required?: boolean): string {
diff --git a/template/plugin/pdk_types.py.ejs b/template/plugin/pdk_types.py.ejs
index edea53e..22e0f4e 100644
--- a/template/plugin/pdk_types.py.ejs
+++ b/template/plugin/pdk_types.py.ejs
@@ -19,7 +19,7 @@ class <%- pythonTypeName(schema.name) %>(Enum):
 @dataclass
 class <%- pythonTypeName(schema.name) %>(JSONWizard):
 <% schema.properties.forEach(p => { -%>
-<% if (!p.nullable && p.required) {%>
+<% if (!p.nullable && p.required !== false) {%>
   <% if (p.description) { -%>
     # <%- formatCommentBlock(p.description, "# ") %>
   <% } -%>
@@ -28,7 +28,7 @@ class <%- pythonTypeName(schema.name) %>(JSONWizard):
 <% }) %>
 
 <% schema.properties.forEach(p => { -%>
-<% if (p.nullable || !p.required) {%>
+<% if (p.nullable || p.required === false) {%>
   <% if (p.description) { -%>
     # <%- formatCommentBlock(p.description, "# ") %>
   <% } -%>