diff --git a/Cargo.lock b/Cargo.lock
index 97d5c3a..77d09a1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -203,7 +203,7 @@ dependencies = [
  "serde_urlencoded",
  "smallvec",
  "socket2",
- "time 0.3.9",
+ "time",
  "url 2.2.2",
 ]
 
@@ -511,17 +511,14 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chrono"
-version = "0.4.22"
+version = "0.4.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfd4d1b31faaa3a89d7934dbded3111da0d2ef28e3ebccdb4f0179f5929d1ef1"
+checksum = "16b0a3d9ed01224b22057780a37bb8c5dbfe1be8ba48678e7bf57ec4b385411f"
 dependencies = [
  "iana-time-zone",
- "js-sys",
  "num-integer",
  "num-traits",
  "serde",
- "time 0.1.44",
- "wasm-bindgen",
  "winapi",
 ]
 
@@ -611,7 +608,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94d4706de1b0fa5b132270cddffa8585166037822e260a944fe161acd137ca05"
 dependencies = [
  "percent-encoding 2.1.0",
- "time 0.3.9",
+ "time",
  "version_check",
 ]
 
@@ -2665,7 +2662,7 @@ dependencies = [
  "serde",
  "siphasher",
  "thiserror",
- "time 0.3.9",
+ "time",
  "tokio",
  "tokio-postgres",
  "toml",
@@ -3082,7 +3079,7 @@ dependencies = [
  "rand 0.8.4",
  "sha3",
  "thiserror",
- "time 0.3.9",
+ "time",
 ]
 
 [[package]]
@@ -3249,17 +3246,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "time"
-version = "0.1.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
-dependencies = [
- "libc",
- "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi",
-]
-
 [[package]]
 name = "time"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index 7f37f2e..f05d61d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ base64 = "0.13.0"
 # Used to decode base58btc
 bs58 = "0.4.0"
 # Used for working with dates
-chrono = { version = "0.4.22", features = ["serde"] }
+chrono = { version = "0.4.23", default-features = false, features = ["std", "serde"] }
 # Used to build admin CLI tool
 clap = { version = "3.2.18", default-features = false, features = ["std", "derive"] }
 # Used for parsing markdown
diff --git a/src/atom/feeds.rs b/src/atom/feeds.rs
index 291a4e1..1112d8e 100644
--- a/src/atom/feeds.rs
+++ b/src/atom/feeds.rs
@@ -10,7 +10,9 @@ use crate::utils::html::clean_html_all;
 const ENTRY_TITLE_MAX_LENGTH: usize = 75;
 
 fn get_min_datetime() -> DateTime<Utc> {
-    DateTime::from_utc(NaiveDateTime::from_timestamp(0, 0), Utc)
+    let native = NaiveDateTime::from_timestamp_opt(0, 0)
+        .expect("0 should be a valid argument");
+    DateTime::from_utc(native, Utc)
 }
 
 fn make_entry(
diff --git a/src/http_signatures/verify.rs b/src/http_signatures/verify.rs
index 0a955cd..755a94a 100644
--- a/src/http_signatures/verify.rs
+++ b/src/http_signatures/verify.rs
@@ -70,7 +70,8 @@ pub fn parse_http_signature(
     let created_at = if let Some(created_at) = signature_parameters.get("created") {
         let create_at_timestamp = created_at.parse()
             .map_err(|_| VerificationError::ParseError("invalid timestamp"))?;
-        Utc.timestamp(create_at_timestamp, 0)
+        Utc.timestamp_opt(create_at_timestamp, 0).single()
+            .ok_or(VerificationError::ParseError("invalid timestamp"))?
     } else {
         let date_str = request_headers.get("date")
             .ok_or(VerificationError::ParseError("missing date"))?
@@ -83,7 +84,8 @@ pub fn parse_http_signature(
     let expires_at = if let Some(expires_at) = signature_parameters.get("expires") {
         let expires_at_timestamp = expires_at.parse()
             .map_err(|_| VerificationError::ParseError("invalid timestamp"))?;
-        Utc.timestamp(expires_at_timestamp, 0)
+        Utc.timestamp_opt(expires_at_timestamp, 0).single()
+            .ok_or(VerificationError::ParseError("invalid timestamp"))?
     } else {
         created_at + Duration::hours(SIGNATURE_EXPIRES_IN)
     };