diff --git a/CMakeLists.txt b/CMakeLists.txt
index 929e1b394..1360b82ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ set(CMAKE_JAVA_TARGET_OUTPUT_DIR ${PROJECT_BINARY_DIR}/jars)
 ######## Set compiler flags ########
 set(CMAKE_CXX_STANDARD_REQUIRED true)
 set(CMAKE_C_STANDARD_REQUIRED true)
-set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_C_STANDARD 11)
 include(GenerateExportHeader)
 if(MSVC)
diff --git a/launcher/java/JavaVersion.cpp b/launcher/java/JavaVersion.cpp
index e9a160ea7..fef573c16 100644
--- a/launcher/java/JavaVersion.cpp
+++ b/launcher/java/JavaVersion.cpp
@@ -63,7 +63,7 @@ bool JavaVersion::isModular() const
     return m_parseable && m_major >= 9;
 }
 
-bool JavaVersion::operator<(const JavaVersion& rhs)
+bool JavaVersion::operator<(const JavaVersion& rhs) const
 {
     if (m_parseable && rhs.m_parseable) {
         auto major = m_major;
@@ -101,7 +101,7 @@ bool JavaVersion::operator<(const JavaVersion& rhs)
         return StringUtils::naturalCompare(m_string, rhs.m_string, Qt::CaseSensitive) < 0;
 }
 
-bool JavaVersion::operator==(const JavaVersion& rhs)
+bool JavaVersion::operator==(const JavaVersion& rhs) const
 {
     if (m_parseable && rhs.m_parseable) {
         return m_major == rhs.m_major && m_minor == rhs.m_minor && m_security == rhs.m_security && m_prerelease == rhs.m_prerelease;
@@ -109,7 +109,7 @@ bool JavaVersion::operator==(const JavaVersion& rhs)
     return m_string == rhs.m_string;
 }
 
-bool JavaVersion::operator>(const JavaVersion& rhs)
+bool JavaVersion::operator>(const JavaVersion& rhs) const
 {
     return (!operator<(rhs)) && (!operator==(rhs));
 }
diff --git a/launcher/java/JavaVersion.h b/launcher/java/JavaVersion.h
index c070bdeec..143ddd262 100644
--- a/launcher/java/JavaVersion.h
+++ b/launcher/java/JavaVersion.h
@@ -20,9 +20,9 @@ class JavaVersion {
 
     JavaVersion& operator=(const QString& rhs);
 
-    bool operator<(const JavaVersion& rhs);
-    bool operator==(const JavaVersion& rhs);
-    bool operator>(const JavaVersion& rhs);
+    bool operator<(const JavaVersion& rhs) const;
+    bool operator==(const JavaVersion& rhs) const;
+    bool operator>(const JavaVersion& rhs) const;
 
     bool requiresPermGen() const;
     bool defaultsToUtf8() const;
diff --git a/launcher/modplatform/ResourceAPI.h b/launcher/modplatform/ResourceAPI.h
index 6641628f6..4d40432ee 100644
--- a/launcher/modplatform/ResourceAPI.h
+++ b/launcher/modplatform/ResourceAPI.h
@@ -90,14 +90,6 @@ class ResourceAPI {
 
         std::optional<std::list<Version>> mcVersions;
         std::optional<ModPlatform::ModLoaderTypes> loaders;
-
-        VersionSearchArgs(VersionSearchArgs const&) = default;
-        void operator=(VersionSearchArgs other)
-        {
-            pack = other.pack;
-            mcVersions = other.mcVersions;
-            loaders = other.loaders;
-        }
     };
     struct VersionSearchCallbacks {
         std::function<void(QJsonDocument&, ModPlatform::IndexedPack)> on_succeed;
@@ -106,9 +98,6 @@ class ResourceAPI {
 
     struct ProjectInfoArgs {
         ModPlatform::IndexedPack pack;
-
-        ProjectInfoArgs(ProjectInfoArgs const&) = default;
-        void operator=(ProjectInfoArgs other) { pack = other.pack; }
     };
     struct ProjectInfoCallbacks {
         std::function<void(QJsonDocument&, const ModPlatform::IndexedPack&)> on_succeed;