diff --git a/pom.xml b/pom.xml
index 9b0bb68..21a82d5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.4.2</version>
+        <version>3.4.13</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>org.ccalm</groupId>
diff --git a/src/main/java/org/ccalm/weather/AirTemperature.java b/src/main/java/org/ccalm/weather/AirTemperature.java
index 80a3402..598d5de 100644
--- a/src/main/java/org/ccalm/weather/AirTemperature.java
+++ b/src/main/java/org/ccalm/weather/AirTemperature.java
@@ -116,7 +116,7 @@ public class AirTemperature implements ServletContextAware {
 
 		//Example request: http://ccalm.org/AirTemperature?date=20210531
 		//Example request: http://127.0.0.1:8080/AirTemperature?date=20210531
-		if(date==null || date.equals(""))
+		if(date==null || date.isEmpty()))
 		{
 			//Если день не задан то ищем максимальный день не старше 10 дней и прибавляем 1 день
 			String sql="select to_char(max(date)+'1 days'::interval, 'YYYYMMDD') from main.air_temperature_dates where hours=0 and date > now() - '10 days'::interval";
@@ -132,7 +132,7 @@ public class AirTemperature implements ServletContextAware {
 				}
 			}
 		}
-		if(date==null || date.equals(""))
+		if(date==null || date.isEmpty())
 		{
 			DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
 			date=dateFormat.format(new Date()); //Date like as "20170327".
@@ -191,7 +191,7 @@ public class AirTemperature implements ServletContextAware {
 				StringBuffer answer2=new StringBuffer(strPos2);
 				Tools.CutBeforeFirst(answer2,":");
 				String posEnd = Tools.CutBeforeFirst(answer2,":");
-				if(posEnd==null || posEnd.equals("")) posEnd=""; else 
+				if(posEnd==null || posEnd.isEmpty()) posEnd=""; else 
 				{
 					posEnd=String.valueOf(Long.parseLong(posEnd)-1);
 				}
diff --git a/src/main/java/org/ccalm/weather/SoilTmperature.java b/src/main/java/org/ccalm/weather/SoilTmperature.java
index 7fedfca..caa98ec 100644
--- a/src/main/java/org/ccalm/weather/SoilTmperature.java
+++ b/src/main/java/org/ccalm/weather/SoilTmperature.java
@@ -136,7 +136,7 @@ public class SoilTmperature implements ServletContextAware {
 		} catch (SQLException ex) {
 			logger.error("N3:"+ex.getMessage(),ex);
 		}
-		if(date==null || date.equals(""))
+		if(date==null || date.isEmpty())
 		{
 			//Если день не задан то ищем максимальный день не старше 10 дней и прибавляем 1 день
 			String sql="select to_char(max(date)+'1 days'::interval, 'YYYYMMDD') from main.soil_temperature_dates where hours=0 and date > now() - '10 days'::interval";
@@ -152,7 +152,7 @@ public class SoilTmperature implements ServletContextAware {
 				}
 			}
 		}
-		if(date==null || date.equals(""))
+		if(date==null || date.isEmpty())
 		{
 			DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
 			date=dateFormat.format(new Date()); //Date like as "20170327".
@@ -216,7 +216,7 @@ public class SoilTmperature implements ServletContextAware {
 				StringBuffer answer2=new StringBuffer(strPos2);
 				Tools.CutBeforeFirst(answer2,":");
 				String posEnd = Tools.CutBeforeFirst(answer2,":");
-				if(posEnd==null || posEnd.equals("")) posEnd=""; else 
+				if(posEnd==null || posEnd.isEmpty()) posEnd=""; else 
 				{
 					posEnd=String.valueOf(Long.parseLong(posEnd)-1);
 				}