diff --git a/binaries/aarch64/tpws b/binaries/aarch64/tpws
index 75a11203..ebb9f768 100755
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diff --git a/binaries/arm/tpws b/binaries/arm/tpws
index eadd3406..345e040e 100755
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diff --git a/binaries/freebsd-x64/tpws b/binaries/freebsd-x64/tpws
index e9c73224..e540b384 100755
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diff --git a/binaries/mac64/tpws b/binaries/mac64/tpws
index fbf180e9..84b2bd4e 100755
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diff --git a/binaries/mips32r1-lsb/tpws b/binaries/mips32r1-lsb/tpws
index 7a717dc7..1afa09c4 100755
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diff --git a/binaries/mips32r1-msb/tpws b/binaries/mips32r1-msb/tpws
index 00d6bdcf..5b1300b7 100755
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diff --git a/binaries/mips64r2-msb/tpws b/binaries/mips64r2-msb/tpws
index 92b64b17..89862aed 100755
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diff --git a/binaries/ppc/tpws b/binaries/ppc/tpws
index 0d68196b..526d1923 100755
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diff --git a/binaries/x86/tpws b/binaries/x86/tpws
index 32ffc089..dfd008e6 100755
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diff --git a/binaries/x86_64/tpws b/binaries/x86_64/tpws
index ae88a73e..0b49cbe9 100755
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diff --git a/binaries/x86_64/tpws_wsl.tgz b/binaries/x86_64/tpws_wsl.tgz
index 7fae0870..639872c1 100644
Binary files a/binaries/x86_64/tpws_wsl.tgz and b/binaries/x86_64/tpws_wsl.tgz differ
diff --git a/tpws/tpws_conn.c b/tpws/tpws_conn.c
index 7b14c6d8..c9b757e6 100644
--- a/tpws/tpws_conn.c
+++ b/tpws/tpws_conn.c
@@ -154,6 +154,25 @@ static bool send_buffer_create(send_buffer_t *sb, const void *data, size_t len,
 	sb->flags = flags;
 	return true;
 }
+static bool send_buffer_realloc(send_buffer_t *sb, size_t extra_bytes)
+{
+	if (sb->data)
+	{
+		uint8_t *p = (uint8_t*)realloc(sb->data, sb->len + extra_bytes);
+		if (p)
+		{
+			sb->data = p;
+			DBGPRINT("reallocated send_buffer from %zd to %zd", sb->len, sb->len + extra_bytes)
+			return true;
+		}
+		else
+		{
+			DBGPRINT("failed to realloc send_buffer from %zd to %zd", sb->len, sb->len + extra_bytes)
+		}
+	}
+	return false;
+}
+
 static void send_buffer_free(send_buffer_t *sb)
 {
 	if (sb->data)
@@ -1117,7 +1136,10 @@ static bool read_all_and_buffer(tproxy_conn_t *conn, int buffer_number)
 					conn->partner->bFlowOut = true;
 					
 					size_t split_pos;
-					tamper(conn, conn->partner->wr_buf[buffer_number].data, numbytes, &conn->partner->wr_buf[buffer_number].len, &split_pos);
+	
+					// tamper may increase data block size by up to 5 bytes
+					if (send_buffer_realloc(conn->partner->wr_buf+buffer_number,5))
+						tamper(conn, conn->partner->wr_buf[buffer_number].data, numbytes, &conn->partner->wr_buf[buffer_number].len, &split_pos);
 					
 					if (epoll_update_flow(conn->partner))
 						return true;