diff --git a/configs/mainnet.yaml b/configs/mainnet.yaml
index 6d71cfa47..3d2de75f0 100644
--- a/configs/mainnet.yaml
+++ b/configs/mainnet.yaml
@@ -122,8 +122,8 @@ BASE_REWARD_FACTOR: 64
 WHISTLEBLOWER_REWARD_QUOTIENT: 512
 # 2**3 (= 8)
 PROPOSER_REWARD_QUOTIENT: 8
-# 2**25 (= 33,554,432)
-INACTIVITY_PENALTY_QUOTIENT: 33554432
+# 2**24 (= 16,777,216)
+INACTIVITY_PENALTY_QUOTIENT: 16777216
 # 2**5 (= 32)
 MIN_SLASHING_PENALTY_QUOTIENT: 32
 
diff --git a/configs/minimal.yaml b/configs/minimal.yaml
index 9daf428b4..b39a4fc01 100644
--- a/configs/minimal.yaml
+++ b/configs/minimal.yaml
@@ -122,8 +122,8 @@ BASE_REWARD_FACTOR: 64
 WHISTLEBLOWER_REWARD_QUOTIENT: 512
 # 2**3 (= 8)
 PROPOSER_REWARD_QUOTIENT: 8
-# 2**25 (= 33,554,432)
-INACTIVITY_PENALTY_QUOTIENT: 33554432
+# 2**24 (= 16,777,216)
+INACTIVITY_PENALTY_QUOTIENT: 16777216
 # 2**5 (= 32)
 MIN_SLASHING_PENALTY_QUOTIENT: 32
 
diff --git a/specs/phase0/beacon-chain.md b/specs/phase0/beacon-chain.md
index 82257947d..2ee1d46bc 100644
--- a/specs/phase0/beacon-chain.md
+++ b/specs/phase0/beacon-chain.md
@@ -242,10 +242,10 @@ The following values are (non-configurable) constants used throughout the specif
 | `BASE_REWARD_FACTOR` | `2**6` (= 64) |
 | `WHISTLEBLOWER_REWARD_QUOTIENT` | `2**9` (= 512) |
 | `PROPOSER_REWARD_QUOTIENT` | `2**3` (= 8) |
-| `INACTIVITY_PENALTY_QUOTIENT` | `2**25` (= 33,554,432) |
+| `INACTIVITY_PENALTY_QUOTIENT` | `2**24` (= 16,777,216) |
 | `MIN_SLASHING_PENALTY_QUOTIENT` | `2**5` (= 32) |
 
-- The `INACTIVITY_PENALTY_QUOTIENT` equals `INVERSE_SQRT_E_DROP_TIME**2` where `INVERSE_SQRT_E_DROP_TIME := 2**12 epochs` (about 18 days) is the time it takes the inactivity penalty to reduce the balance of non-participating validators to about `1/sqrt(e) ~= 60.6%`. Indeed, the balance retained by offline validators after `n` epochs is about `(1 - 1/INACTIVITY_PENALTY_QUOTIENT)**(n**2/2)`; so after `INVERSE_SQRT_E_DROP_TIME` epochs, it is roughly `(1 - 1/INACTIVITY_PENALTY_QUOTIENT)**(INACTIVITY_PENALTY_QUOTIENT/2) ~= 1/sqrt(e)`.
+- The `INACTIVITY_PENALTY_QUOTIENT` equals `INVERSE_SQRT_E_DROP_TIME**2` where `INVERSE_SQRT_E_DROP_TIME := 2**12` epochs (about 18 days) is the time it takes the inactivity penalty to reduce the balance of non-participating validators to about `1/sqrt(e) ~= 60.6%`. Indeed, the balance retained by offline validators after `n` epochs is about `(1 - 1/INACTIVITY_PENALTY_QUOTIENT)**(n**2/2)`; so after `INVERSE_SQRT_E_DROP_TIME` epochs, it is roughly `(1 - 1/INACTIVITY_PENALTY_QUOTIENT)**(INACTIVITY_PENALTY_QUOTIENT/2) ~= 1/sqrt(e)`.
 
 ### Max operations per block