diff --git a/Cargo.lock b/Cargo.lock
index cfb8dba..7508960 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,13 +4,13 @@ version = 3
 
 [[package]]
 name = "autocfg"
-version = "1.0.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
 name = "bato"
-version = "0.1.5"
+version = "0.1.6"
 dependencies = [
  "cmake",
  "serde",
@@ -19,79 +19,79 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.70"
+version = "1.0.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d26a6ce4b6a484fa3edb70f7efa6fc430fd2b87285fe8b84304fd0936faa0dc0"
+checksum = "2fff2a6927b3bb87f9595d67196a70493f627687a71d87a0d692242c33f58c11"
 
 [[package]]
 name = "cmake"
-version = "0.1.45"
+version = "0.1.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb6210b637171dfba4cda12e579ac6dc73f5165ad56133e5d72ef3131f320855"
+checksum = "e8ad8cef104ac57b68b89df3208164d228503abbdce70f6880ffa3d970e7443a"
 dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "dtoa"
-version = "0.4.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56899898ce76aaf4a0f24d914c97ea6ed976d42fec6ad33fcbb0a1103e07b2b0"
-
 [[package]]
 name = "hashbrown"
-version = "0.11.2"
+version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "indexmap"
-version = "1.7.0"
+version = "1.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc633605454125dec4b66843673f01c7df2b89479b32e0ed634e43a91cff62a5"
+checksum = "10a35a97730320ffe8e2d410b5d3b69279b98d2c14bdb8b70ea89ecf7888d41e"
 dependencies = [
  "autocfg",
  "hashbrown",
 ]
 
 [[package]]
-name = "linked-hash-map"
-version = "0.5.4"
+name = "itoa"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
+checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.29"
+version = "1.0.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9f5105d4fdaab20335ca9565e106a5d9b82b6219b5ba735731124ac6711d23d"
+checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
 dependencies = [
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.9"
+version = "1.0.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3d0b9745dc2debf507c8422de05d7226cc1f0644216dfdfead988f9b1ab32a7"
+checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
 dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "ryu"
+version = "1.0.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+
 [[package]]
 name = "serde"
-version = "1.0.130"
+version = "1.0.143"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f12d06de37cf59146fbdecab66aa99f9fe4f78722e3607577a5375d66bd0c913"
+checksum = "53e8e5d5b70924f74ff5c6d64d9a5acd91422117c60f48c4e07855238a254553"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.130"
+version = "1.0.143"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7bc1a1ab1961464eae040d96713baa5a724a8152c1222492465b54322ec508b"
+checksum = "d3d8e8de557aee63c26b85b947f5e59b690d0454c753f3adeb5cd7835ab88391"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -100,38 +100,36 @@ dependencies = [
 
 [[package]]
 name = "serde_yaml"
-version = "0.8.21"
+version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d8c608a35705a5d3cdc9fbe403147647ff34b921f8e833e49306df898f9b20af"
+checksum = "79b7c9017c64a49806c6e8df8ef99b92446d09c92457f85f91835b01a8064ae0"
 dependencies = [
- "dtoa",
  "indexmap",
+ "itoa",
+ "ryu",
  "serde",
- "yaml-rust",
+ "unsafe-libyaml",
 ]
 
 [[package]]
 name = "syn"
-version = "1.0.76"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6f107db402c2c2055242dbf4d2af0e69197202e9faacbef9571bbe47f5a1b84"
+checksum = "58dbef6ec655055e20b86b15a8cc6d439cca19b667537ac6a1369572d151ab13"
 dependencies = [
  "proc-macro2",
  "quote",
- "unicode-xid",
+ "unicode-ident",
 ]
 
 [[package]]
-name = "unicode-xid"
-version = "0.2.2"
+name = "unicode-ident"
+version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
+checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
 
 [[package]]
-name = "yaml-rust"
-version = "0.4.5"
+name = "unsafe-libyaml"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
-dependencies = [
- "linked-hash-map",
-]
+checksum = "931179334a56395bcf64ba5e0ff56781381c1a5832178280c7d7f91d1679aeb0"
diff --git a/Cargo.toml b/Cargo.toml
index e0a5490..8df91a8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,14 +1,14 @@
 [package]
 name = "bato"
-version = "0.1.5"
+version = "0.1.6"
 authors = ["pierre <dommerc.pierre@gmail.com>"]
-edition = "2018"
+edition = "2021"
 links = "notilus"
 build = "build.rs"
 
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
-serde_yaml = "0.8"
+serde_yaml = "0.9"
 
 [build-dependencies]
 cmake = "0.1"
diff --git a/src/lib.rs b/src/lib.rs
index c341080..197ce40 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -39,6 +39,27 @@ pub enum Urgency {
 }
 
 #[derive(Debug, Serialize, Deserialize)]
+pub struct NotificationConfig {
+    summary: String,
+    body: Option<String>,
+    icon: Option<String>,
+    urgency: Option<Urgency>,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct UserConfig {
+    pub tick_rate: Option<u32>,
+    bat_name: Option<String>,
+    low_level: u32,
+    critical_level: u32,
+    full_design: Option<bool>,
+    critical: Option<NotificationConfig>,
+    low: Option<NotificationConfig>,
+    full: Option<NotificationConfig>,
+    charging: Option<NotificationConfig>,
+    discharging: Option<NotificationConfig>,
+}
+
 pub struct Notification {
     summary: CString,
     body: Option<CString>,
@@ -46,7 +67,28 @@ pub struct Notification {
     urgency: Option<Urgency>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+impl TryFrom<NotificationConfig> for Notification {
+    type Error = Error;
+
+    fn try_from(config: NotificationConfig) -> Result<Self, Self::Error> {
+        let summary = CString::new(config.summary).map_err(|_| "NulError")?;
+        let body = config
+            .body
+            .map(|s| CString::new(s).map_err(|_| "NulError"))
+            .transpose()?;
+        let icon = config
+            .icon
+            .map(|s| CString::new(s).map_err(|_| "NulError"))
+            .transpose()?;
+        Ok(Notification {
+            summary,
+            body,
+            icon,
+            urgency: config.urgency,
+        })
+    }
+}
+
 pub struct Config {
     pub tick_rate: Option<u32>,
     bat_name: Option<String>,
@@ -67,9 +109,31 @@ impl Config {
             env::var("XDG_CONFIG_HOME").unwrap_or_else(|_| format!("{}/.config", home));
         let content = fs::read_to_string(format!("{}/bato/bato.yaml", config_path))
             .map_err(|err| format!("while reading the config file, {}", err))?;
-        let config: Config = serde_yaml::from_str(&content)
+        let user_config: UserConfig = serde_yaml::from_str(&content)
             .map_err(|err| format!("while deserializing the config file, {}", err))?;
-        Ok(config)
+        let critical = user_config
+            .critical
+            .map(Notification::try_from)
+            .transpose()?;
+
+        Ok(Config {
+            tick_rate: user_config.tick_rate,
+            bat_name: user_config.bat_name,
+            low_level: user_config.low_level,
+            critical_level: user_config.critical_level,
+            full_design: user_config.full_design,
+            critical,
+            low: user_config.low.map(Notification::try_from).transpose()?,
+            full: user_config.full.map(Notification::try_from).transpose()?,
+            charging: user_config
+                .charging
+                .map(Notification::try_from)
+                .transpose()?,
+            discharging: user_config
+                .discharging
+                .map(Notification::try_from)
+                .transpose()?,
+        })
     }
 
     pub fn normalize(&mut self) -> &Self {