diff --git a/src/assume/mod.rs b/src/assume/mod.rs
index e36bfde..fdf1363 100644
--- a/src/assume/mod.rs
+++ b/src/assume/mod.rs
@@ -44,12 +44,13 @@ fn run_raw(profile: &str, config: &Config) -> Result<(), String> {
     let mut assumer = RoleAssumer::new(config.region.clone(), &mut cred_file, config);
     assumer.assume(profile)?;
     print_profile(profile, config);
-    if Utc::now() - state.last_version_check_time
-        > Duration::days(config.check_new_version_interval_days as i64)
-    {
-        check_newer_version();
-        state.last_version_check_time = Utc::now();
-        state.save()?;
+
+    if let Some(check_every_days) = config.check_new_version_interval_days {
+        if Utc::now() - state.last_version_check_time > Duration::days(check_every_days as i64) {
+            check_newer_version();
+            state.last_version_check_time = Utc::now();
+            state.save()?;
+        }
     }
 
     main_credentials::rotate_if_needed(config, &mut cred_file, &mut state)?;
diff --git a/src/config.rs b/src/config.rs
index a605e24..0161c88 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -17,7 +17,7 @@ pub struct Config {
     mfa_serial_number: String,
     mfa_command: Option<String>,
     pub profiles: LinkedHashMap<ProfileName, Profile>,
-    pub check_new_version_interval_days: u32,
+    pub check_new_version_interval_days: Option<u32>,
     pub modify_shell_prompt: bool,
     pub region: Region,
     session_name: String,
@@ -108,7 +108,7 @@ impl Config {
                     )
                 })
                 .collect(),
-            check_new_version_interval_days: rc.check_new_version_interval_days.unwrap_or(7),
+            check_new_version_interval_days: rc.check_new_version_interval_days,
             modify_shell_prompt: rc.modify_shell_prompt.unwrap_or(true),
             region,
             session_name: rc.session_name.unwrap_or_else(|| "awscredx".to_owned()),
diff --git a/src/init/templates/config.toml b/src/init/templates/config.toml
index 3020710..6c877b3 100644
--- a/src/init/templates/config.toml
+++ b/src/init/templates/config.toml
@@ -21,7 +21,8 @@ mfa_serial_number = "arn:aws:iam::MAIN_ACCOUNT_ID:mfa/USERNAME"
 # mfa_command = "ykman oath accounts code | awk '/SOME_PATTERN/ {print $2}'"
 
 # How often to check for new version.
-check_new_version_interval_days = 7
+# Comment out to disable.
+check_new_version_interval_days = 30
 
 # This will prepend the assumed profile and the expiration time to your shell prompt.
 # You can disable this feature and directly use environment variable `AWS_PROFILE` with