diff --git a/poem-openapi/src/types/external/bson.rs b/poem-openapi/src/types/external/bson.rs
index f51e0fdbee..cec396ff3f 100644
--- a/poem-openapi/src/types/external/bson.rs
+++ b/poem-openapi/src/types/external/bson.rs
@@ -62,7 +62,7 @@ impl ParseFromMultipartField for ObjectId {
 
 impl ToJSON for ObjectId {
     fn to_json(&self) -> Option<Value> {
-        Some(serde_json::to_value(self).unwrap())
+        serde_json::to_value(self).ok()
     }
 }
 
diff --git a/poem-openapi/src/types/external/floats.rs b/poem-openapi/src/types/external/floats.rs
index cb387f3874..7f80cfe5f1 100644
--- a/poem-openapi/src/types/external/floats.rs
+++ b/poem-openapi/src/types/external/floats.rs
@@ -71,7 +71,7 @@ macro_rules! impl_type_for_floats {
 
         impl ToJSON for $ty {
             fn to_json(&self) -> Option<Value> {
-                Some(Value::Number(Number::from_f64(*self as f64).unwrap()))
+                Number::from_f64(*self as f64).map(Value::Number)
             }
         }
 
diff --git a/poem-openapi/src/types/external/time.rs b/poem-openapi/src/types/external/time.rs
index 51f0dc37c8..1d34d19006 100644
--- a/poem-openapi/src/types/external/time.rs
+++ b/poem-openapi/src/types/external/time.rs
@@ -69,7 +69,7 @@ impl ParseFromMultipartField for OffsetDateTime {
 
 impl ToJSON for OffsetDateTime {
     fn to_json(&self) -> Option<Value> {
-        Some(Value::String(self.format(&Rfc3339).unwrap_or_default()))
+        self.format(&Rfc3339).ok().map(Value::String)
     }
 }
 
@@ -129,7 +129,7 @@ macro_rules! impl_naive_datetime_types {
 
         impl ToJSON for $ty {
             fn to_json(&self) -> Option<Value> {
-                Some(Value::String(self.format($format_description).unwrap()))
+                self.format($format_description).ok().map(Value::String)
             }
         }
     };