diff --git a/gradle/versioning.gradle b/gradle/versioning.gradle
index b45853d..367ac38 100644
--- a/gradle/versioning.gradle
+++ b/gradle/versioning.gradle
@@ -1,6 +1,6 @@
 //noinspection GroovyAssignabilityCheck
 version = new ProjectVersion(
-        '1', '0', '26', System.env.TRAVIS_BUILD_NUMBER
+        '1', '0', '27', System.env.TRAVIS_BUILD_NUMBER
 )
 
 println "Version number: " + version
diff --git a/src/main/kotlin/com/jalgoarena/compile/JvmCompiler.kt b/src/main/kotlin/com/jalgoarena/compile/JvmCompiler.kt
index 451a8c5..a973c9f 100644
--- a/src/main/kotlin/com/jalgoarena/compile/JvmCompiler.kt
+++ b/src/main/kotlin/com/jalgoarena/compile/JvmCompiler.kt
@@ -3,6 +3,7 @@ package com.jalgoarena.compile
 import com.jalgoarena.JudgeApplication
 import org.slf4j.LoggerFactory
 import java.lang.reflect.Method
+import java.lang.reflect.Modifier
 import java.net.URL
 import java.net.URLClassLoader
 
@@ -16,7 +17,7 @@ interface JvmCompiler {
         )
 
         clazz.declaredMethods
-                .filter { it.name == methodName && it.parameterCount == parameterCount }
+                .filter { it.name == methodName && it.parameterCount == parameterCount && Modifier.isPublic(it.modifiers)}
                 .forEach {
                     try {
                         return Pair(clazz.newInstance(), it)
diff --git a/src/test/kotlin/com/jalgoarena/web/JudgeControllerSpec.kt b/src/test/kotlin/com/jalgoarena/web/JudgeControllerSpec.kt
index 2e8e4e7..3e363cd 100644
--- a/src/test/kotlin/com/jalgoarena/web/JudgeControllerSpec.kt
+++ b/src/test/kotlin/com/jalgoarena/web/JudgeControllerSpec.kt
@@ -243,7 +243,7 @@ class JudgeControllerSpec {
         return 1L
 """)
 
-    private val FIB_SOURCE_CODE_WITH_MEMORY_ARRAY = sourceCode("""val numbersFromOne = IntArray(100000) { it + 1 }
+    private val FIB_SOURCE_CODE_WITH_MEMORY_ARRAY = sourceCode("""val numbersFromOne = IntArray(200000) { it + 1 }
         var a: Long = 0
         var b: Long = 1