diff --git a/src/states/sha1.cpp b/src/states/sha1.cpp
index 5d9fe7d..874a962 100644
--- a/src/states/sha1.cpp
+++ b/src/states/sha1.cpp
@@ -110,7 +110,7 @@ bool SHA1::iterate(float delta) {
 			float& timer = std::get<float>(*it);
 			timer += delta;
 
-			if (timer >= 15.f) {
+			if (timer >= 10.f) {
 				it = _queue_requested_chunk.erase(it);
 			} else {
 				it++;
@@ -257,7 +257,7 @@ bool SHA1::onFT1ReceiveInitSHA1Info(uint32_t, uint32_t, const uint8_t*, size_t,
 
 void SHA1::onFT1ReceiveDataSHA1Info(uint32_t, uint32_t, uint8_t, size_t, const uint8_t*, size_t) {
 	// no, in this state we have init
-	assert(false && "ft should have said dropped this for us!");
+	assert(false && "ft should have dropped this for us!");
 }
 
 void SHA1::onFT1SendDataSHA1Info(uint32_t group_number, uint32_t peer_number, uint8_t transfer_id, size_t data_offset, uint8_t* data, size_t data_size) {
diff --git a/src/tox_client.cpp b/src/tox_client.cpp
index 75d97f6..d85e024 100644
--- a/src/tox_client.cpp
+++ b/src/tox_client.cpp
@@ -197,8 +197,9 @@ ToxClient::~ToxClient(void) {
 }
 
 bool ToxClient::iterate(void) {
-	// HACK: hardcoded 5ms sleep in main
-	float time_delta {0.005f};
+	auto new_time = std::chrono::high_resolution_clock::now();
+	const float time_delta {std::chrono::duration<float>(new_time - _last_time).count()};
+	_last_time = new_time;
 
 	tox_iterate(_tox, this);
 	NGC_FT1_iterate(_tox, _ft1_ctx, time_delta);
diff --git a/src/tox_client.hpp b/src/tox_client.hpp
index 9ffd20d..fa7a9a6 100644
--- a/src/tox_client.hpp
+++ b/src/tox_client.hpp
@@ -8,6 +8,7 @@
 #include <ngc_ext.h>
 #include <ngc_ft1.h>
 
+#include <chrono>
 #include <string>
 #include <string_view>
 #include <map>
@@ -73,6 +74,8 @@ struct ToxClient {
 		NGC_EXT_CTX* _ext_ctx {nullptr};
 		NGC_FT1* _ft1_ctx {nullptr};
 
+		std::chrono::time_point<std::chrono::high_resolution_clock> _last_time {std::chrono::high_resolution_clock::now()};
+
 		std::string _self_name;
 
 		std::string _tox_profile_path;