diff --git a/README.md b/README.md
index 7e13ca2..0a9d2d9 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ extension=timecop.so
 ## SYSTEM REQUIREMENTS
 
 - OS: Linux, macOS
-- PHP: 5.3.1 - 7.1.x (might work on 5.2.x and 5.3.0, but not tested enough)
+- PHP: 5.3.1 - 7.2.x (might work on 5.2.x and 5.3.0, but not tested enough)
 - SAPI: Apache, CLI
   - Other SAPIs are not tested, but there is no SAPI-dependent code.
 - non-ZTS(recommended), ZTS
diff --git a/php_timecop.h b/php_timecop.h
index 2d1466e..cef742c 100644
--- a/php_timecop.h
+++ b/php_timecop.h
@@ -112,7 +112,11 @@ ZEND_BEGIN_MODULE_GLOBALS(timecop)
 	tc_timeval freezed_time;
 	tc_timeval travel_origin;
 	tc_timeval travel_offset;
-	tc_timeval_long scaling_factor;
+#if PHP_VERSION_ID >= 70000
+	zend_long scaling_factor;
+#else
+	long scaling_factor;
+#endif
 	zend_class_entry *ce_DateTimeZone;
 	zend_class_entry *ce_DateTimeInterface;
 	zend_class_entry *ce_DateTime;
diff --git a/tc_timeval.c b/tc_timeval.c
index 9e35d64..8498574 100644
--- a/tc_timeval.c
+++ b/tc_timeval.c
@@ -26,7 +26,11 @@ SOFTWARE.
 
 int tc_timeval_add(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *arg2)
 {
-	tc_timeval_long sec, usec;
+#if PHP_MAJOR_VERSION >= 7
+	zend_long sec, usec;
+#else
+	long sec, usec;
+#endif
 	usec = arg1->usec + arg2->usec;
 	sec  = arg1->sec + arg2->sec;
 	if (usec < 0) {
@@ -47,7 +51,11 @@ int tc_timeval_add(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *ar
 }
 int tc_timeval_sub(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *arg2)
 {
-	tc_timeval_long sec, usec;
+#if PHP_MAJOR_VERSION >= 7
+	zend_long sec, usec;
+#else
+	long sec, usec;
+#endif
 	usec = arg1->usec - arg2->usec;
 	sec  = arg1->sec - arg2->sec;
 	if (usec < 0) {
@@ -66,9 +74,18 @@ int tc_timeval_sub(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *ar
 
 	return 0;
 }
-int tc_timeval_mul(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval_long arg2)
+
+#if PHP_MAJOR_VERSION >= 7
+int tc_timeval_mul(tc_timeval *ret, const tc_timeval *arg1, const zend_long arg2)
+#else
+int tc_timeval_mul(tc_timeval *ret, const tc_timeval *arg1, const long arg2)
+#endif
 {
-	tc_timeval_long sec, usec;
+#if PHP_MAJOR_VERSION >= 7
+	zend_long sec, usec;
+#else
+	long sec, usec;
+#endif
 	usec = arg1->usec * arg2;
 	sec  = arg1->sec * arg2;
 	if (usec < 0) {
diff --git a/tc_timeval.h b/tc_timeval.h
index fb25903..bf0f8a9 100644
--- a/tc_timeval.h
+++ b/tc_timeval.h
@@ -29,20 +29,24 @@ SOFTWARE.
 #  define USEC_PER_SEC 1000000
 #endif
 
+typedef struct _tc_timeval {
 #if PHP_MAJOR_VERSION >= 7
-typedef zend_long tc_timeval_long;
+	zend_long sec;
+	zend_long usec;
 #else
-typedef long tc_timeval_long;
+	long sec;
+	long usec;
 #endif
-
-typedef struct _tc_timeval {
-	tc_timeval_long sec;
-	tc_timeval_long usec;
 } tc_timeval;
 
+
 int tc_timeval_add(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *arg2);
 int tc_timeval_sub(tc_timeval *ret, const tc_timeval *arg1, const tc_timeval *arg2);
+#if PHP_MAJOR_VERSION >= 7
+int tc_timeval_mul(tc_timeval *ret, const tc_timeval *arg1, const zend_long arg2);
+#else
 int tc_timeval_mul(tc_timeval *ret, const tc_timeval *arg1, const long arg2);
+#endif
 
 #endif	/* TC_TIMEVAL_H */
 
diff --git a/timecop_php5.c b/timecop_php5.c
index 4e73b2f..d266a5d 100644
--- a/timecop_php5.c
+++ b/timecop_php5.c
@@ -1323,7 +1323,7 @@ static int get_current_time(tc_timeval *now TSRMLS_DC)
 	if (ts == -1) {
 		ret = -1;
 	} else {
-		now->sec  = ts;
+		now->sec  = (long)ts;
 		now->usec = 0;
 	}
 #endif
diff --git a/timecop_php7.c b/timecop_php7.c
index f673af0..ec7400d 100644
--- a/timecop_php7.c
+++ b/timecop_php7.c
@@ -1231,15 +1231,15 @@ static int get_current_time(tc_timeval *now)
 	struct timeval tv;
 	ret = gettimeofday(&tv, NULL);
 	if (ret == 0) {
-		now->sec  = (long)tv.tv_sec;
-		now->usec = (long)tv.tv_usec;
+		now->sec  = (zend_long)tv.tv_sec;
+		now->usec = (zend_long)tv.tv_usec;
 	}
 #else
 	time_t ts = time(NULL);
 	if (ts == -1) {
 		ret = -1;
 	} else {
-		now->sec  = ts;
+		now->sec  = (zend_long)ts;
 		now->usec = 0;
 	}
 #endif