diff --git a/src/cleanup_swiftnet.c b/src/cleanup_swiftnet.c
index 0bdb220..4bc8752 100644
--- a/src/cleanup_swiftnet.c
+++ b/src/cleanup_swiftnet.c
@@ -5,7 +5,7 @@
 #include <stdint.h>
 #include <stdio.h>
 
-static inline void close_listeners() {
+static inline void close_listeners(void) {
     LOCK_ATOMIC_DATA_TYPE(&listeners.atomic_lock);
     
     LOOP_HASHMAP(&listeners, struct Listener*,
@@ -22,13 +22,13 @@ static inline void close_listeners() {
     hashmap_destroy(&listeners);
 }
 
-static inline void close_background_service() {
+static inline void close_background_service(void) {
     atomic_store_explicit(&swiftnet_closing, true, memory_order_release);
 
     pthread_join(memory_cleanup_thread, NULL);
 }
 
-void swiftnet_cleanup() {
+void swiftnet_cleanup(void) {
     close_background_service();
 
     allocator_destroy(&packet_queue_node_memory_allocator ENABLE_INTERNAL_CHECK);
diff --git a/src/initialize_swiftnet.c b/src/initialize_swiftnet.c
index 920b10d..b190428 100644
--- a/src/initialize_swiftnet.c
+++ b/src/initialize_swiftnet.c
@@ -55,7 +55,7 @@ pthread_t memory_cleanup_thread;
 
 _Atomic bool swiftnet_closing;
 
-static inline void initialize_allocators() {
+static inline void initialize_allocators(void) {
     packet_queue_node_memory_allocator = allocator_create(sizeof(struct SwiftNetPacketQueueNode), 40 * SWIFT_NET_MEMORY_USAGE);
     packet_callback_queue_node_memory_allocator = allocator_create(sizeof(struct SwiftNetPacketCallbackQueueNode), 40 * SWIFT_NET_MEMORY_USAGE);
     server_packet_data_memory_allocator = allocator_create(sizeof(struct SwiftNetServerPacketData), 40 * SWIFT_NET_MEMORY_USAGE);
@@ -79,7 +79,7 @@ static inline void initialize_allocators() {
     #endif
 }
 
-static inline void initialize_vectors() {
+static inline void initialize_vectors(void) {
     #ifndef SWIFT_NET_DISABLE_REQUESTS
     requests_sent = hashmap_create(&request_sent_key_allocator);
     #endif
@@ -87,11 +87,11 @@ static inline void initialize_vectors() {
     listeners = hashmap_create(NULL);
 }
 
-static inline void initialize_memory_cleanup_thread() {
+static inline void initialize_memory_cleanup_thread(void) {
     pthread_create(&memory_cleanup_thread, NULL, memory_cleanup_background_service, NULL);
 }
 
-void swiftnet_initialize() {
+void swiftnet_initialize(void) {
     #ifdef SWIFT_NET_BACKEND_DPDK
     char dpdk_args[1024];
     char* argv[32];
diff --git a/src/swift_net.h b/src/swift_net.h
index 1570bef..4f18934 100644
--- a/src/swift_net.h
+++ b/src/swift_net.h
@@ -374,7 +374,7 @@ extern void swiftnet_client_cleanup(struct SwiftNetClientConnection* const clien
 extern void swiftnet_server_cleanup(struct SwiftNetServer* const server);
 
 // Initialize the SwiftNet library.
-extern void swiftnet_initialize();
+extern void swiftnet_initialize(void);
 
 // Send a packet from the client to its connected server.
 extern void swiftnet_client_send_packet(
@@ -445,7 +445,7 @@ extern void swiftnet_server_destroy_packet_data(
 );
 
 // Clean up the entire SwiftNet library.
-extern void swiftnet_cleanup();
+extern void swiftnet_cleanup(void);
 
 #ifndef SWIFT_NET_DISABLE_REQUESTS
 
diff --git a/tests/integration_tests_dpdk/src/making_request.c b/tests/integration_tests_dpdk/src/making_request.c
index 87c50c6..bd5498c 100644
--- a/tests/integration_tests_dpdk/src/making_request.c
+++ b/tests/integration_tests_dpdk/src/making_request.c
@@ -22,13 +22,13 @@ static _Atomic uint32_t g_response_data_len = 0;
 
 const uint8_t g_make_request_code = 0xFF;
 
-static void wait_until_response_sent() {
+static void wait_until_response_sent(void) {
     while (atomic_load_explicit(&g_sent_response, memory_order_acquire) == false) {
         usleep(1000);
     }
 }
 
-static void reset_test_state() {
+static void reset_test_state(void) {
     swiftnet_server_cleanup(atomic_load_explicit(&g_server, memory_order_acquire));
     swiftnet_client_cleanup(atomic_load_explicit(&g_client_conn, memory_order_acquire));
 
diff --git a/tests/integration_tests_dpdk/src/run_tests.c b/tests/integration_tests_dpdk/src/run_tests.c
index 7aaca26..0f201cd 100644
--- a/tests/integration_tests_dpdk/src/run_tests.c
+++ b/tests/integration_tests_dpdk/src/run_tests.c
@@ -15,7 +15,7 @@
 
 char private_ip_address_testing[INET_ADDRSTRLEN];
 
-int main() {
+int main(void) {
     get_private_ip_from_socket();
 
     const struct Test tests[] = {
diff --git a/tests/integration_tests_dpdk/src/sending_packet.c b/tests/integration_tests_dpdk/src/sending_packet.c
index 455cd1c..182e6a9 100644
--- a/tests/integration_tests_dpdk/src/sending_packet.c
+++ b/tests/integration_tests_dpdk/src/sending_packet.c
@@ -20,7 +20,7 @@ static _Atomic (uint8_t*) g_server_data = NULL;
 static _Atomic uint32_t g_client_data_len = 0;
 static _Atomic uint32_t g_server_data_len = 0;
 
-static void reset_test_state() {
+static void reset_test_state(void) {
     swiftnet_server_cleanup(atomic_load_explicit(&g_server, memory_order_acquire));
     swiftnet_client_cleanup(atomic_load_explicit(&g_client_conn, memory_order_acquire));
 
diff --git a/tests/integration_tests_pcap/src/making_request.c b/tests/integration_tests_pcap/src/making_request.c
index d2382f7..b56bb6e 100644
--- a/tests/integration_tests_pcap/src/making_request.c
+++ b/tests/integration_tests_pcap/src/making_request.c
@@ -22,13 +22,13 @@ static _Atomic uint32_t g_response_data_len = 0;
 
 const uint8_t g_make_request_code = 0xFF;
 
-static void wait_until_response_sent() {
+static void wait_until_response_sent(void) {
     while (atomic_load_explicit(&g_sent_response, memory_order_acquire) == false) {
         usleep(1000);
     }
 }
 
-static void reset_test_state() {
+static void reset_test_state(void) {
     swiftnet_server_cleanup(atomic_load_explicit(&g_server, memory_order_acquire));
     swiftnet_client_cleanup(atomic_load_explicit(&g_client_conn, memory_order_acquire));
 
diff --git a/tests/integration_tests_pcap/src/run_tests.c b/tests/integration_tests_pcap/src/run_tests.c
index b1f04bf..872f549 100644
--- a/tests/integration_tests_pcap/src/run_tests.c
+++ b/tests/integration_tests_pcap/src/run_tests.c
@@ -15,7 +15,7 @@
 
 char private_ip_address_testing[INET_ADDRSTRLEN];
 
-int main() {
+int main(void) {
     get_private_ip_from_socket();
 
     const struct Test tests[] = {
diff --git a/tests/integration_tests_pcap/src/sending_packet.c b/tests/integration_tests_pcap/src/sending_packet.c
index 27ddcd9..0d89937 100644
--- a/tests/integration_tests_pcap/src/sending_packet.c
+++ b/tests/integration_tests_pcap/src/sending_packet.c
@@ -20,7 +20,7 @@ static _Atomic (uint8_t*) g_server_data = NULL;
 static _Atomic uint32_t g_client_data_len = 0;
 static _Atomic uint32_t g_server_data_len = 0;
 
-static void reset_test_state() {
+static void reset_test_state(void) {
     swiftnet_server_cleanup(atomic_load_explicit(&g_server, memory_order_acquire));
     swiftnet_client_cleanup(atomic_load_explicit(&g_client_conn, memory_order_acquire));
 
diff --git a/tests/performance_tests/src/main.c b/tests/performance_tests/src/main.c
index c56dbd7..d58a0ff 100644
--- a/tests/performance_tests/src/main.c
+++ b/tests/performance_tests/src/main.c
@@ -81,7 +81,7 @@ void send_large_packets(const bool loopback) {
     swiftnet_client_cleanup(client);
 }
 
-int main() {
+int main(void) {
     swiftnet_initialize();
 
     send_large_packets(true);
diff --git a/tests/shared.h b/tests/shared.h
index bb34e97..c24ee1e 100644
--- a/tests/shared.h
+++ b/tests/shared.h
@@ -29,7 +29,7 @@ enum ConnectionType {
 
 extern char private_ip_address_testing[INET_ADDRSTRLEN];
 
-static inline int get_private_ip_from_socket() {
+static inline int get_private_ip_from_socket(void) {
     const int temp_socket = socket(AF_INET, SOCK_DGRAM, 0);
     if (temp_socket < 0) {
         PRINT_ERROR("Failed to create temp socket");