diff --git a/ngrinder-controller/build.gradle b/ngrinder-controller/build.gradle
index a0dace9287..1faa1c1f02 100644
--- a/ngrinder-controller/build.gradle
+++ b/ngrinder-controller/build.gradle
@@ -59,7 +59,7 @@ dependencies {
     implementation (group: "jaxen", name: "jaxen", version: "1.1.4")
     implementation (group: "com.beust", name: "jcommander", version: "1.32")
     implementation (group: "org.pf4j", name: "pf4j", version: "3.0.1")
-    implementation (group: "org.yaml", name: "snakeyaml", version: "1.25")
+    implementation (group: "com.esotericsoftware.yamlbeans", name: "yamlbeans", version: "1.17")
     implementation (group: "commons-collections", name: "commons-collections", version: "3.2.1")
     implementation (group: "org.reflections", name: "reflections", version: "0.9.9")
     implementation (group: "com.hazelcast", name: "hazelcast", version: hazelcast_version)
diff --git a/ngrinder-controller/src/main/java/org/ngrinder/script/service/GitHubFileEntryService.java b/ngrinder-controller/src/main/java/org/ngrinder/script/service/GitHubFileEntryService.java
index f9529cd7fb..c509b474fd 100644
--- a/ngrinder-controller/src/main/java/org/ngrinder/script/service/GitHubFileEntryService.java
+++ b/ngrinder-controller/src/main/java/org/ngrinder/script/service/GitHubFileEntryService.java
@@ -1,5 +1,6 @@
 package org.ngrinder.script.service;
 
+import com.esotericsoftware.yamlbeans.YamlReader;
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.slf4j.Slf4j;
@@ -26,7 +27,6 @@
 import org.tmatesoft.svn.core.SVNURL;
 import org.tmatesoft.svn.core.auth.BasicAuthenticationManager;
 import org.tmatesoft.svn.core.wc.*;
-import org.yaml.snakeyaml.Yaml;
 
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -280,23 +280,24 @@ public Set<GitHubConfig> getAllGitHubConfig(User user) throws FileNotFoundExcept
 
 	private Set<GitHubConfig> getAllGithubConfig(FileEntry gitConfigYaml) {
 		Set<GitHubConfig> gitHubConfig = new HashSet<>();
-		// Yaml is not thread safe. so create it every time.
-		Yaml yaml = new Yaml();
-		Iterable<Map<String, Object>> gitConfigs = cast(yaml.loadAll(gitConfigYaml.getContent()));
-		for (Map<String, Object> configMap : gitConfigs) {
-			if (configMap == null) {
-				continue;
-			}
-			configMap.put("revision", gitConfigYaml.getRevision());
-			GitHubConfig config = objectMapper.convertValue(configMap, GitHubConfig.class);
+		try (YamlReader reader = new YamlReader(gitConfigYaml.getContent())) {
+			Map<String, Object> gitConfigMap = cast(reader.read());
+			while (gitConfigMap != null) {
+				gitConfigMap.put("revision", gitConfigYaml.getRevision());
+				GitHubConfig config = objectMapper.convertValue(gitConfigMap, GitHubConfig.class);
+
+				if (gitHubConfig.contains(config)) {
+					throw new InvalidGitHubConfigurationException("GitHub configuration '"
+							+ config.getName() + "' is duplicated.\nPlease check your .gitconfig.yml");
+				}
 
-			if (gitHubConfig.contains(config)) {
-				throw new InvalidGitHubConfigurationException("GitHub configuration '"
-					+ config.getName() + "' is duplicated.\nPlease check your .gitconfig.yml");
-			}
+				gitHubConfig.add(config);
 
-			gitHubConfig.add(config);
-		}
+				gitConfigMap = cast(reader.read());
+			}
+		} catch (IOException e) {
+			throw new InvalidGitHubConfigurationException("Fail to read GitHub configuration.", e);
+        }
 		return gitHubConfig;
 	}
 
diff --git a/ngrinder-controller/src/test/java/org/ngrinder/script/service/GitHubFileEntryServiceTest.java b/ngrinder-controller/src/test/java/org/ngrinder/script/service/GitHubFileEntryServiceTest.java
new file mode 100644
index 0000000000..6bd0a6e11a
--- /dev/null
+++ b/ngrinder-controller/src/test/java/org/ngrinder/script/service/GitHubFileEntryServiceTest.java
@@ -0,0 +1,88 @@
+package org.ngrinder.script.service;
+
+import org.apache.commons.io.FileUtils;
+import org.junit.Before;
+import org.junit.Test;
+import org.ngrinder.AbstractNGrinderTransactionalTest;
+import org.ngrinder.common.util.CompressionUtils;
+import org.ngrinder.model.User;
+import org.ngrinder.script.model.FileEntry;
+import org.ngrinder.script.model.GitHubConfig;
+import org.ngrinder.script.repository.MockFileEntityRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.io.ClassPathResource;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Set;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasItems;
+import static org.hamcrest.Matchers.is;
+
+public class GitHubFileEntryServiceTest extends AbstractNGrinderTransactionalTest {
+
+    private static final String GITHUB_CONFIG_NAME = ".gitconfig.yml";
+
+    @Autowired
+    private GitHubFileEntryService gitHubFileEntryService;
+
+    @Autowired
+    private MockFileEntityRepository mockFileEntityRepository;
+
+    @Before
+    public void before() throws IOException {
+        File file = new File(System.getProperty("java.io.tmpdir"), "repo");
+        FileUtils.deleteQuietly(file);
+        CompressionUtils.unzip(new ClassPathResource("TEST_USER.zip").getFile(), file);
+        mockFileEntityRepository.setUserRepository(new File(file, getTestUser().getUserId()));
+    }
+
+    @Test
+    public void getAllGitHubConfig() throws Exception {
+        User testUser = getTestUser();
+
+        FileEntry fileEntry = new FileEntry();
+        fileEntry.setContent("name: My Github Config\n" +
+                "owner: naver\n" +
+                "repo: ngrinder\n" +
+                "access-token: e1a47e652762b60a...3ddc0713b07g13k\n" +
+                "---\n" +
+                "name: Another Config\n" +
+                "owner: naver\n" +
+                "repo: pinpoint\n" +
+                "access-token: t9a47e6ff262b60a...3dac0713b07e82a\n" +
+                "branch: feature/add-ngrinder-scripts\n" +
+                "base-url: https://api.mygithub.com\n" +
+                "script-root: ngrinder-scripts\n"
+        );
+        fileEntry.setEncoding("UTF-8");
+        fileEntry.setPath(GITHUB_CONFIG_NAME);
+        fileEntry.setDescription("for unit test");
+        mockFileEntityRepository.save(testUser, fileEntry, fileEntry.getEncoding());
+
+        Set<GitHubConfig> gitHubConfigs = gitHubFileEntryService.getAllGitHubConfig(testUser);
+
+        assertThat(gitHubConfigs.size(), is(2));
+        assertThat(
+                gitHubConfigs,
+                hasItems(
+                        GitHubConfig.builder()
+                                .name("My Github Config")
+                                .owner("naver")
+                                .repo("ngrinder")
+                                .accessToken("e1a47e652762b60a...3ddc0713b07g13k")
+                                .build(),
+                        GitHubConfig.builder()
+                                .name("Another Config")
+                                .owner("naver")
+                                .repo("pinpoint")
+                                .accessToken("t9a47e6ff262b60a...3dac0713b07e82a")
+                                .branch("feature/add-ngrinder-scripts")
+                                .baseUrl("https://api.mygithub.com")
+                                .scriptRoot("ngrinder-scripts")
+                                .build()
+                )
+        );
+    }
+}