diff --git a/core/src/main/java/tech/ydb/core/ssl/YandexTrustManagersProvider.java b/core/src/main/java/tech/ydb/core/ssl/YandexTrustManagersProvider.java
index 3a2dc24f2..53554e88f 100644
--- a/core/src/main/java/tech/ydb/core/ssl/YandexTrustManagersProvider.java
+++ b/core/src/main/java/tech/ydb/core/ssl/YandexTrustManagersProvider.java
@@ -1,6 +1,7 @@
 package tech.ydb.core.ssl;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.security.KeyStore;
 import java.security.KeyStoreException;
 import java.security.NoSuchAlgorithmException;
@@ -16,7 +17,7 @@
 import javax.net.ssl.X509TrustManager;
 
 final class YandexTrustManagersProvider {
-    private static final String JSK_YANDEX_CA_STORE = "certificates/YandexAllCAs.pkcs";
+    private static final String YANDEX_CA_STORE = "certificates/YandexAllCAs.pkcs";
     private static final String STORE_PASSWORD = "yandex";
 
     private final TrustManager[] trustManagers;
@@ -51,8 +52,9 @@ private List<TrustManager> getDefaultTrustManagers() throws NoSuchAlgorithmExcep
     private List<TrustManager> getCustomTrustManagers()
             throws KeyStoreException, IOException, NoSuchAlgorithmException, CertificateException {
         KeyStore keyStore = KeyStore.getInstance("PKCS12");
-        keyStore.load(YandexTrustManagersProvider.class.getClassLoader().getResourceAsStream(JSK_YANDEX_CA_STORE),
-                STORE_PASSWORD.toCharArray());
+        try (InputStream is = YandexTrustManagersProvider.class.getClassLoader().getResourceAsStream(YANDEX_CA_STORE)) {
+            keyStore.load(is, STORE_PASSWORD.toCharArray());
+        }
         return getTrustManagersFromKeyStore(keyStore);
     }
 
diff --git a/core/src/main/java/tech/ydb/core/utils/Version.java b/core/src/main/java/tech/ydb/core/utils/Version.java
index 5d0b2a0ac..c5efd173f 100644
--- a/core/src/main/java/tech/ydb/core/utils/Version.java
+++ b/core/src/main/java/tech/ydb/core/utils/Version.java
@@ -13,9 +13,8 @@ private Version() {
     }
 
     public static Optional<String> getVersion() {
-        try {
+        try (InputStream in = Version.class.getResourceAsStream("/ydb_sdk_version.properties")) {
             Properties prop = new Properties();
-            InputStream in = Version.class.getResourceAsStream("/ydb_sdk_version.properties");
             prop.load(in);
             return Optional.ofNullable(prop.getProperty("version"));
         } catch (Exception ex) {