diff --git a/src/consts.rs b/src/consts.rs
index 3aa7b38..bddd95a 100644
--- a/src/consts.rs
+++ b/src/consts.rs
@@ -20,6 +20,9 @@ pub const ONE_ORE: u64 = 10u64.pow(TOKEN_DECIMALS as u32);
 /// The duration of one minute, in seconds.
 pub const ONE_MINUTE: i64 = 60;
 
+/// The duration of an Ore epoch, in seconds.
+pub const EPOCH_DURATION: i64 = ONE_MINUTE.saturating_mul(3);
+
 /// The duration of two years, in minutes.
 pub const TWO_YEARS: u64 = 60 * 24 * 365 * 2;
 
diff --git a/src/processor/mine.rs b/src/processor/mine.rs
index 6a75d42..a55132e 100644
--- a/src/processor/mine.rs
+++ b/src/processor/mine.rs
@@ -21,7 +21,7 @@ use crate::{
     loaders::*,
     state::{Bus, Config, Proof},
     utils::AccountDeserialize,
-    MIN_DIFFICULTY, ONE_MINUTE, TWO_YEARS,
+    EPOCH_DURATION, MIN_DIFFICULTY, ONE_MINUTE, TWO_YEARS,
 };
 
 /// Mine is the primary workhorse instruction of the Ore program. Its responsibilities include:
@@ -70,6 +70,7 @@ pub fn process_mine<'a, 'info>(
         return Err(OreError::IsPaused.into());
     }
 
+    // TODO Is this really needed?
     // Validate the clock state
     let clock = Clock::get().or(Err(ProgramError::InvalidAccountData))?;
     let mut proof_data = proof_info.data.borrow_mut();
@@ -79,9 +80,10 @@ pub fn process_mine<'a, 'info>(
     }
 
     // Validate epoch is active
-    if clock
-        .unix_timestamp
-        .ge(&config.last_reset_at.saturating_add(ONE_MINUTE))
+    if config
+        .last_reset_at
+        .saturating_add(EPOCH_DURATION)
+        .le(&clock.unix_timestamp)
     {
         return Err(OreError::NeedsReset.into());
     }
diff --git a/src/processor/reset.rs b/src/processor/reset.rs
index a2fe824..ed385fb 100644
--- a/src/processor/reset.rs
+++ b/src/processor/reset.rs
@@ -12,7 +12,7 @@ use crate::{
     },
     state::{Bus, Config},
     utils::AccountDeserialize,
-    BUS_COUNT, BUS_EPOCH_REWARDS, MAX_EPOCH_REWARDS, MAX_SUPPLY, MINT_ADDRESS, ONE_MINUTE,
+    BUS_COUNT, BUS_EPOCH_REWARDS, EPOCH_DURATION, MAX_EPOCH_REWARDS, MAX_SUPPLY, MINT_ADDRESS,
     SMOOTHING_FACTOR, TARGET_EPOCH_REWARDS, TREASURY, TREASURY_BUMP,
 };
 
@@ -79,8 +79,11 @@ pub fn process_reset<'a, 'info>(
 
     // Validate enough time has passed since last reset
     let clock = Clock::get().or(Err(ProgramError::InvalidAccountData))?;
-    let threshold = config.last_reset_at.saturating_add(ONE_MINUTE);
-    if clock.unix_timestamp.lt(&threshold) {
+    if config
+        .last_reset_at
+        .saturating_add(EPOCH_DURATION)
+        .gt(&clock.unix_timestamp)
+    {
         return Ok(());
     }