diff --git a/src/lib_gui/qt/project_wizard/content/QtProjectWizardContentJavaStandard.cpp b/src/lib_gui/qt/project_wizard/content/QtProjectWizardContentJavaStandard.cpp
index 98174447..dbec2796 100644
--- a/src/lib_gui/qt/project_wizard/content/QtProjectWizardContentJavaStandard.cpp
+++ b/src/lib_gui/qt/project_wizard/content/QtProjectWizardContentJavaStandard.cpp
@@ -30,7 +30,7 @@ void QtProjectWizardContentJavaStandard::load()
 		std::vector<std::wstring> standards = m_sourceGroupSettings->getAvailableJavaStandards();
 		for (size_t i = 0; i < standards.size(); i++)
 		{
-			m_standard->insertItem(i, QString::fromStdWString(standards[i]));
+			m_standard->insertItem(static_cast<int>(i), QString::fromStdWString(standards[i]));
 		}
 
 		m_standard->setCurrentText(QString::fromStdWString(m_sourceGroupSettings->getJavaStandard()));
diff --git a/src/lib_java/data/parser/java/JavaEnvironment.cpp b/src/lib_java/data/parser/java/JavaEnvironment.cpp
index f866c1c5..8ccadcd7 100644
--- a/src/lib_java/data/parser/java/JavaEnvironment.cpp
+++ b/src/lib_java/data/parser/java/JavaEnvironment.cpp
@@ -147,7 +147,7 @@ void JavaEnvironment::registerNativeMethods(std::string className, std::vector<N
 	jclass javaClass = m_env->FindClass(className.c_str());
 	if (javaClass)
 	{
-		if (m_env->RegisterNatives(javaClass, jniMethods, methods.size()) < 0)
+		if (m_env->RegisterNatives(javaClass, jniMethods, static_cast<jint>(methods.size())) < 0)
 		{
 			LOG_ERROR("RegisterNatives failed");
 		}
diff --git a/src/test/JavaIndexSampleProjectsTestSuite.cpp b/src/test/JavaIndexSampleProjectsTestSuite.cpp
index 08613d9f..5b9e0aaa 100644
--- a/src/test/JavaIndexSampleProjectsTestSuite.cpp
+++ b/src/test/JavaIndexSampleProjectsTestSuite.cpp
@@ -114,7 +114,7 @@ void processSourceFile(
 			expectedOutput->getLineCount() == output->getLineCount());
 		if (expectedOutput->getLineCount() == output->getLineCount())
 		{
-			for (size_t i = 1; i <= expectedOutput->getLineCount(); i++)
+			for (unsigned int i = 1; i <= expectedOutput->getLineCount(); i++)
 			{
 				REQUIRE(expectedOutput->getLine(i) == output->getLine(i));
 			}