diff --git a/conf/stellar.toml b/conf/stellar.toml
index d50c2cf..bbefa23 100644
--- a/conf/stellar.toml
+++ b/conf/stellar.toml
@@ -13,9 +13,9 @@ cpu_mask = [5, 6, 7, 8, 9, 10, 11, 12]
 
 [ip_reassembly]
 enable = 1
-timeout = 10000    # range: [1, 60000] (ms)
-bucket_entries = 8 # range: [1, 256] (must be power of 2)
-bucket_num = 4096  # range: [1, 4294967295]
+timeout = 10000      # range: [1, 60000] (ms)
+bucket_entries = 256 # range: [1, 4294967295] (must be power of 2)
+bucket_num = 4096    # range: [1, 4294967295]
 
 [session_manager]
 # max session number
@@ -53,4 +53,4 @@ evicted_session_filter_error_rate = 0.00001 # range: [0.0, 1.0]
 # TCP reassembly (Per direction)
 tcp_reassembly_enable = 1
 tcp_reassembly_max_timeout = 10000 # range: [1, 60000] (ms)
-tcp_reassembly_max_segments = 128  # range: [2, 512]
+tcp_reassembly_max_segments = 256  # range: [2, 4096]
diff --git a/src/ip_reassembly/ip_reassembly.cpp b/src/ip_reassembly/ip_reassembly.cpp
index c0ae372..fc667dd 100644
--- a/src/ip_reassembly/ip_reassembly.cpp
+++ b/src/ip_reassembly/ip_reassembly.cpp
@@ -66,7 +66,7 @@ enum
     IP_LAST_FRAG_IDX,
     IP_FIRST_FRAG_IDX,
     IP_MIN_FRAG_NUM,
-    IP_MAX_FRAG_NUM = 8,
+    IP_MAX_FRAG_NUM = 64,
 };
 
 struct ip_frag_hdr
@@ -208,9 +208,9 @@ static int check_options(const struct ip_reassembly_options *opts)
             return -1;
         }
 
-        if (opts->bucket_entries < 1 || opts->bucket_entries > 256 || is_power_of_2(opts->bucket_entries) == 0)
+        if (opts->bucket_entries < 1 || is_power_of_2(opts->bucket_entries) == 0)
         {
-            IP_REASSEMBLE_DEBUG("invalid bucket_entries: %u, supported range: [1, 256] (must be power of 2)", opts->bucket_entries);
+            IP_REASSEMBLE_DEBUG("invalid bucket_entries: %u, must be power of 2", opts->bucket_entries);
             return -1;
         }
 
diff --git a/src/ip_reassembly/ip_reassembly.h b/src/ip_reassembly/ip_reassembly.h
index 736cc1f..de81280 100644
--- a/src/ip_reassembly/ip_reassembly.h
+++ b/src/ip_reassembly/ip_reassembly.h
@@ -9,7 +9,7 @@ struct ip_reassembly_options
 {
     uint8_t enable;
     uint32_t timeout;        // range: [1, 60000]
-    uint32_t bucket_entries; // range: [1, 256] (must be power of 2)
+    uint32_t bucket_entries; // range: [1, 4294967295] (must be power of 2)
     uint32_t bucket_num;     // range: [1, 4294967295]
 };
 
diff --git a/src/session/session_manager.cpp b/src/session/session_manager.cpp
index 65ca17b..2a22678 100644
--- a/src/session/session_manager.cpp
+++ b/src/session/session_manager.cpp
@@ -225,9 +225,9 @@ static int check_options(const struct session_manager_options *opts)
                SESSION_LOG_ERROR("invalid tcp_reassembly_max_timeout: %u, supported range: [1, 60000]", opts->tcp_reassembly_max_timeout);
                return -1;
           }
-          if (opts->tcp_reassembly_max_segments < 2 || opts->tcp_reassembly_max_segments > 512)
+          if (opts->tcp_reassembly_max_segments < 2 || opts->tcp_reassembly_max_segments > 4096)
           {
-               SESSION_LOG_ERROR("invalid tcp_reassembly_max_segments: %u, supported range: [2, 512]", opts->tcp_reassembly_max_segments);
+               SESSION_LOG_ERROR("invalid tcp_reassembly_max_segments: %u, supported range: [2, 4096]", opts->tcp_reassembly_max_segments);
                return -1;
           }
      }
diff --git a/test/packet_inject/conf/stellar.toml b/test/packet_inject/conf/stellar.toml
index 171a42a..5aa7c7e 100644
--- a/test/packet_inject/conf/stellar.toml
+++ b/test/packet_inject/conf/stellar.toml
@@ -14,7 +14,7 @@ cpu_mask = [5]
 [ip_reassembly]
 enable = 1
 timeout = 10000    # range: [1, 60000] (ms)
-bucket_entries = 8 # range: [1, 256] (must be power of 2)
+bucket_entries = 8 # range: [1, 4294967295] (must be power of 2)
 bucket_num = 4096  # range: [1, 4294967295]
 
 [session_manager]
@@ -53,4 +53,4 @@ evicted_session_filter_error_rate = 0.00001 # range: [0.0, 1.0]
 # TCP reassembly (Per direction)
 tcp_reassembly_enable = 1
 tcp_reassembly_max_timeout = 10000 # range: [1, 60000] (ms)
-tcp_reassembly_max_segments = 128  # range: [2, 512]
+tcp_reassembly_max_segments = 128  # range: [2, 4096]