diff --git a/config/iroha_test_config.json b/config/iroha_test_config.json
index ad415a54587..f6b1a900a08 100644
--- a/config/iroha_test_config.json
+++ b/config/iroha_test_config.json
@@ -32,8 +32,8 @@
         "public_key": "ed01208E351A70B6A603ED285D666B8D689B680865913BA03CE29FB7D13A166C4E7F1F"
       }
     ],
-    "COMMIT_TIME_LIMIT_MS": 2000,
-    "MAX_TRANSACTIONS_IN_BLOCK": 8192,
+    "COMMIT_TIME_LIMIT_MS": 120000,
+    "MAX_TRANSACTIONS_IN_BLOCK": 20,
     "ACTOR_CHANNEL_CAPACITY": 100,
     "GOSSIP_BATCH_SIZE": 500,
     "GOSSIP_PERIOD_MS": 1000,
@@ -47,7 +47,7 @@
     "FETCH_SIZE": 10
   },
   "BLOCK_SYNC": {
-    "GOSSIP_PERIOD_MS": 10000,
+    "GOSSIP_PERIOD_MS": 1000,
     "BLOCK_BATCH_SIZE": 4,
     "ACTOR_CHANNEL_CAPACITY": 100
   },
diff --git a/config/src/block_sync.rs b/config/src/block_sync.rs
index 6802fcce9c9..24771aba681 100644
--- a/config/src/block_sync.rs
+++ b/config/src/block_sync.rs
@@ -3,7 +3,7 @@ use iroha_config_base::derive::{Documented, Proxy};
 use serde::{Deserialize, Serialize};
 
 const DEFAULT_BLOCK_BATCH_SIZE: u32 = 4;
-const DEFAULT_GOSSIP_PERIOD_MS: u64 = 10000;
+const DEFAULT_GOSSIP_PERIOD_MS: u64 = 1000;
 const DEFAULT_ACTOR_CHANNEL_CAPACITY: u32 = 100;
 
 /// Configuration for `BlockSynchronizer`.
diff --git a/config/src/sumeragi.rs b/config/src/sumeragi.rs
index c6929d441d6..f76df6dc6b2 100644
--- a/config/src/sumeragi.rs
+++ b/config/src/sumeragi.rs
@@ -13,9 +13,9 @@ use self::default::*;
 /// Module with a set of default values.
 pub mod default {
     /// Default number of miliseconds the peer waits for transactions before creating a block.
-    pub const DEFAULT_BLOCK_TIME_MS: u64 = 2000;
+    pub const DEFAULT_BLOCK_TIME_MS: u64 = 1000;
     /// Default amount of time allocated for voting on a block before a peer can ask for a view change.
-    pub const DEFAULT_COMMIT_TIME_LIMIT_MS: u64 = 4000;
+    pub const DEFAULT_COMMIT_TIME_LIMIT_MS: u64 = 120000;
     /// Unused const. Should be removed in the future.
     pub const DEFAULT_ACTOR_CHANNEL_CAPACITY: u32 = 100;
     /// Default duration in ms between every transaction gossip.
@@ -23,7 +23,7 @@ pub mod default {
     /// Default maximum number of transactions sent in single gossip message.
     pub const DEFAULT_GOSSIP_BATCH_SIZE: u32 = 500;
     /// Default maximum number of transactions in block.
-    pub const DEFAULT_MAX_TRANSACTIONS_IN_BLOCK: u32 = 2_u32.pow(9);
+    pub const DEFAULT_MAX_TRANSACTIONS_IN_BLOCK: u32 = 20;
 
     /// Default estimation of consensus duration.
     #[allow(clippy::integer_division)]
diff --git a/configs/peer/config.json b/configs/peer/config.json
index 02211ed3072..89d4668bac1 100644
--- a/configs/peer/config.json
+++ b/configs/peer/config.json
@@ -12,10 +12,10 @@
   "SUMERAGI": {
     "KEY_PAIR": null,
     "PEER_ID": null,
-    "BLOCK_TIME_MS": 2000,
+    "BLOCK_TIME_MS": 1000,
     "TRUSTED_PEERS": null,
-    "COMMIT_TIME_LIMIT_MS": 4000,
-    "MAX_TRANSACTIONS_IN_BLOCK": 512,
+    "COMMIT_TIME_LIMIT_MS": 120000,
+    "MAX_TRANSACTIONS_IN_BLOCK": 20,
     "ACTOR_CHANNEL_CAPACITY": 100,
     "GOSSIP_BATCH_SIZE": 500,
     "GOSSIP_PERIOD_MS": 1000
@@ -28,7 +28,7 @@
     "FETCH_SIZE": 10
   },
   "BLOCK_SYNC": {
-    "GOSSIP_PERIOD_MS": 10000,
+    "GOSSIP_PERIOD_MS": 1000,
     "BLOCK_BATCH_SIZE": 4,
     "ACTOR_CHANNEL_CAPACITY": 100
   },
diff --git a/docs/source/references/config.md b/docs/source/references/config.md
index a3f4468ca4b..2b720df29b3 100644
--- a/docs/source/references/config.md
+++ b/docs/source/references/config.md
@@ -43,10 +43,10 @@ The following is the default configuration used by Iroha.
   "SUMERAGI": {
     "KEY_PAIR": null,
     "PEER_ID": null,
-    "BLOCK_TIME_MS": 2000,
+    "BLOCK_TIME_MS": 1000,
     "TRUSTED_PEERS": null,
-    "COMMIT_TIME_LIMIT_MS": 4000,
-    "MAX_TRANSACTIONS_IN_BLOCK": 512,
+    "COMMIT_TIME_LIMIT_MS": 120000,
+    "MAX_TRANSACTIONS_IN_BLOCK": 20,
     "ACTOR_CHANNEL_CAPACITY": 100,
     "GOSSIP_BATCH_SIZE": 500,
     "GOSSIP_PERIOD_MS": 1000
@@ -59,7 +59,7 @@ The following is the default configuration used by Iroha.
     "FETCH_SIZE": 10
   },
   "BLOCK_SYNC": {
-    "GOSSIP_PERIOD_MS": 10000,
+    "GOSSIP_PERIOD_MS": 1000,
     "BLOCK_BATCH_SIZE": 4,
     "ACTOR_CHANNEL_CAPACITY": 100
   },
@@ -141,7 +141,7 @@ Has type `Option<block_sync::ConfigurationProxy>`[^1]. Can be configured via env
 {
   "ACTOR_CHANNEL_CAPACITY": 100,
   "BLOCK_BATCH_SIZE": 4,
-  "GOSSIP_PERIOD_MS": 10000
+  "GOSSIP_PERIOD_MS": 1000
 }
 ```
 
@@ -172,7 +172,7 @@ The period of time to wait between sending requests for the latest block.
 Has type `Option<u64>`[^1]. Can be configured via environment variable `BLOCK_SYNC_GOSSIP_PERIOD_MS`
 
 ```json
-10000
+1000
 ```
 
 ## `disable_panic_terminal_colors`
@@ -522,12 +522,12 @@ Has type `Option<Box<sumeragi::ConfigurationProxy>>`[^1]. Can be configured via
 ```json
 {
   "ACTOR_CHANNEL_CAPACITY": 100,
-  "BLOCK_TIME_MS": 2000,
-  "COMMIT_TIME_LIMIT_MS": 4000,
+  "BLOCK_TIME_MS": 1000,
+  "COMMIT_TIME_LIMIT_MS": 120000,
   "GOSSIP_BATCH_SIZE": 500,
   "GOSSIP_PERIOD_MS": 1000,
   "KEY_PAIR": null,
-  "MAX_TRANSACTIONS_IN_BLOCK": 512,
+  "MAX_TRANSACTIONS_IN_BLOCK": 20,
   "PEER_ID": null,
   "TRUSTED_PEERS": null
 }
@@ -550,7 +550,7 @@ The period of time a peer waits for the `CreatedBlock` message after getting a `
 Has type `Option<u64>`[^1]. Can be configured via environment variable `SUMERAGI_BLOCK_TIME_MS`
 
 ```json
-2000
+1000
 ```
 
 ### `sumeragi.commit_time_limit_ms`
@@ -560,7 +560,7 @@ The period of time a peer waits for `CommitMessage` from the proxy tail.
 Has type `Option<u64>`[^1]. Can be configured via environment variable `SUMERAGI_COMMIT_TIME_LIMIT_MS`
 
 ```json
-4000
+120000
 ```
 
 ### `sumeragi.gossip_batch_size`
@@ -600,7 +600,7 @@ The upper limit of the number of transactions per block.
 Has type `Option<u32>`[^1]. Can be configured via environment variable `SUMERAGI_MAX_TRANSACTIONS_IN_BLOCK`
 
 ```json
-512
+20
 ```
 
 ### `sumeragi.peer_id`