diff --git a/Cargo.toml b/Cargo.toml
index 0291523482..f654247267 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ rust-version = "1.75"
 [workspace.dependencies]
 poem = { path = "poem", version = "3.1.0", default-features = false }
 poem-derive = { path = "poem-derive", version = "3.1.0" }
-poem-openapi-derive = { path = "poem-openapi-derive", version = "5.1.0" }
+poem-openapi-derive = { path = "poem-openapi-derive", version = "5.1.1" }
 poem-grpc-build = { path = "poem-grpc-build", version = "0.5.0" }
 
 proc-macro-crate = "3.0.0"
diff --git a/examples/poem/redis-session/Cargo.toml b/examples/poem/redis-session/Cargo.toml
index 98ba74ce2e..96eba1a330 100644
--- a/examples/poem/redis-session/Cargo.toml
+++ b/examples/poem/redis-session/Cargo.toml
@@ -8,7 +8,7 @@ publish.workspace = true
 poem = { workspace = true, features = ["redis-session"] }
 tokio = { workspace = true, features = ["rt-multi-thread", "macros"] }
 tracing-subscriber.workspace = true
-redis = { version = "0.26.0", features = [
+redis = { version = "0.27", features = [
     "aio",
     "tokio-comp",
     "connection-manager",
diff --git a/poem-openapi-derive/Cargo.toml b/poem-openapi-derive/Cargo.toml
index 13ff8c2ff8..08c7d59b66 100644
--- a/poem-openapi-derive/Cargo.toml
+++ b/poem-openapi-derive/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "poem-openapi-derive"
-version = "5.1.0"
+version = "5.1.1"
 authors.workspace = true
 edition.workspace = true
 license.workspace = true
diff --git a/poem-openapi/CHANGELOG.md b/poem-openapi/CHANGELOG.md
index 6a58ef0da7..c6f31521a7 100644
--- a/poem-openapi/CHANGELOG.md
+++ b/poem-openapi/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - implements `Serialize` and `Deserialize` for `poem_openapi::types::Any<T>`.
 
+# [5.1.1] 2024-09-13
+
+- fix [#883](https://github.com/poem-web/poem/issues/883)
+
 # [5.1.0] 2024-09-08
 
 - fix read_only_with_default test when only default features are enabled [#854](https://github.com/poem-web/poem/pulls)
diff --git a/poem-openapi/Cargo.toml b/poem-openapi/Cargo.toml
index f001ce119f..ce65c0dfd4 100644
--- a/poem-openapi/Cargo.toml
+++ b/poem-openapi/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "poem-openapi"
-version = "5.1.0"
+version = "5.1.1"
 authors.workspace = true
 edition.workspace = true
 license.workspace = true
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)
             }
         }
     };
diff --git a/poem/CHANGELOG.md b/poem/CHANGELOG.md
index c04e0e7137..0bdcf5516b 100644
--- a/poem/CHANGELOG.md
+++ b/poem/CHANGELOG.md
@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-# [3.1.0] 2024-09-28
+# [3.1.0] 2024-09-08
 
 - build(deps): update nix requirement from 0.28.0 to 0.29.0 [#851](https://github.com/poem-web/poem/pull/851)
 - Add manual `Default` implementation for `#[handler]` [#848](https://github.com/poem-web/poem/pull/848)
diff --git a/poem/Cargo.toml b/poem/Cargo.toml
index 3d789c2f28..d337475339 100644
--- a/poem/Cargo.toml
+++ b/poem/Cargo.toml
@@ -118,7 +118,7 @@ chrono = { workspace = true, optional = true, default-features = false, features
 time = { version = "0.3", optional = true }
 mime_guess = { version = "2.0.3", optional = true }
 rand = { version = "0.8.4", optional = true }
-redis = { version = "0.26.0", optional = true, features = [
+redis = { version = "0.27", optional = true, features = [
     "aio",
     "tokio-comp",
     "connection-manager",