diff --git a/Cargo.lock b/Cargo.lock
index 37c95b6..d68141c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 4
+version = 3
 
 [[package]]
 name = "ab_glyph"
@@ -2101,6 +2101,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5dfd88e563464686c916c7e46e623e520ddc6d79fa6641390f2e3fa86e83e885"
 dependencies = [
  "deranged",
+ "itoa",
  "js-sys",
  "num-conv",
  "powerfmt",
diff --git a/Cargo.toml b/Cargo.toml
index 81433fd..c223f03 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@ linux-embedded-hal = "0.3.0"
 embedded-hal = "0.2.5"
 libc = "0.2.98"
 rusqlite = "0.32.1"
-time = { version = "0.3.9", features = ["parsing"] }
+time = { version = "0.3.9", features = ["parsing", "formatting"] }
 time-tz = "2"
 image = { version = "0.24.1", optional = true }
 serde_json = "1.0.79"
diff --git a/default.nix b/default.nix
index fb16079..8508dbf 100644
--- a/default.nix
+++ b/default.nix
@@ -2,7 +2,7 @@
 
 rustPlatform.buildRustPackage {
   pname = "raspi-oled";
-  version = "unstable-infdev-4";
+  version = "unstable-infdev-6";
 
   src = ./.;
 
@@ -16,7 +16,7 @@ rustPlatform.buildRustPackage {
 
   nativeBuildInputs = [ pkg-config ];
 
-  cargoBuildFlags = [ "--no-default-features" "--bin" "take_measurement" ];
+  cargoBuildFlags = [ "--no-default-features" "--bin" "main_loop" ];
 
   buildInputs = [ sqlite ];
 
diff --git a/src/github.rs b/src/github.rs
index 2ad37cb..7eaef1b 100644
--- a/src/github.rs
+++ b/src/github.rs
@@ -1,6 +1,7 @@
 use std::error::Error;
 
 use serde::Deserialize;
+use time::{macros::format_description, PrimitiveDateTime};
 
 #[derive(Debug, Clone, PartialEq, Deserialize)]
 #[non_exhaustive]
@@ -207,9 +208,16 @@ pub fn get_new_notifications(
 	}
 	let json = resp.call()?.into_string()?;
 	let items: Vec<Notification> = serde_json::from_str(&json)?;
-	let last_modified = items
+	let mut last_modified = items
 		.get(0)
 		.map(|x| x.updated_at.clone())
 		.or_else(|| last_modified.map(|x| x.to_owned()));
+	if let Some(lm) = last_modified.as_mut() {
+		// parse and increase by one second
+		let format = format_description!("[year]-[month]-[day]T[hour]:[minute]:[second]Z");
+		let mut dt = PrimitiveDateTime::parse(lm, format)?;
+		dt += time::Duration::seconds(1);
+		*lm = dt.format(&format)?;
+	}
 	Ok((items, last_modified))
 }