diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,7 +10,7 @@
 include(FeatureSummary)
 
 set(QT_MIN_VERSION "5.8.0")
-set(KF5_MIN_VERSION "5.48.0")
+set(KF5_MIN_VERSION "5.64.0")
 find_package(Qt5 ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS DBus Network Widgets Svg)
 
 find_package(Qt5Test ${QT_MIN_VERSION} CONFIG QUIET)
diff --git a/nfs/nfsv2.cpp b/nfs/nfsv2.cpp
--- a/nfs/nfsv2.cpp
+++ b/nfs/nfsv2.cpp
@@ -862,7 +862,7 @@
     const QString partFilePath = destPath + QLatin1String(".part");
     const NFSFileHandle partFH = getFileHandle(partFilePath);
     const bool bPartExists = !partFH.isInvalid();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bPartExists) {
         int rpcStatus;
@@ -992,7 +992,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep size.
-            const unsigned int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const unsigned int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (writeArgs.offset <  size) {
                 if (!remove(partFilePath)) {
                     qCDebug(LOG_KIO_NFS) << "Could not remove part file, ignoring...";
@@ -1077,7 +1077,7 @@
     bool bResume = false;
     const QFileInfo partInfo(destPath + QLatin1String(".part"));
     const bool bPartExists = partInfo.exists();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bMarkPartial && bPartExists && partInfo.size() > 0) {
         if (partInfo.isDir()) {
@@ -1195,7 +1195,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep
-            const int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (partInfo.size() <  size) {
                 QFile::remove(partInfo.absoluteFilePath());
             }
@@ -1277,7 +1277,7 @@
     const QString partFilePath = destPath + QLatin1String(".part");
     const NFSFileHandle partFH = getFileHandle(partFilePath);
     const bool bPartExists = !partFH.isInvalid();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bPartExists) {
         int rpcStatus;
@@ -1392,7 +1392,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep size.
-            const unsigned int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const unsigned int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (writeArgs.offset <  size) {
                 if (!remove(partFilePath)) {
                     qCDebug(LOG_KIO_NFS) << "Could not remove part file, ignoring...";
diff --git a/nfs/nfsv3.cpp b/nfs/nfsv3.cpp
--- a/nfs/nfsv3.cpp
+++ b/nfs/nfsv3.cpp
@@ -1107,7 +1107,7 @@
     const QString partFilePath = destPath + QLatin1String(".part");
     const NFSFileHandle partFH = getFileHandle(partFilePath);
     const bool bPartExists = !partFH.isInvalid();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bPartExists) {
         int rpcStatus;
@@ -1241,7 +1241,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep size.
-            const unsigned int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const unsigned int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (writeArgs.offset <  size) {
                 if (!remove(partFilePath)) {
                     qCDebug(LOG_KIO_NFS) << "Could not remove part file, ignoring...";
@@ -1333,7 +1333,7 @@
     bool bResume = false;
     const QFileInfo partInfo(destPath + QLatin1String(".part"));
     const bool bPartExists = partInfo.exists();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bMarkPartial && bPartExists && partInfo.size() > 0) {
         if (partInfo.isDir()) {
@@ -1451,7 +1451,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep
-            const int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (partInfo.size() <  size) {
                 QFile::remove(partInfo.absoluteFilePath());
             }
@@ -1531,7 +1531,7 @@
     const QString partFilePath = destPath + QLatin1String(".part");
     const NFSFileHandle partFH = getFileHandle(partFilePath);
     const bool bPartExists = !partFH.isInvalid();
-    const bool bMarkPartial = m_slave->config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = m_slave->configValue(QStringLiteral("MarkPartial"), true);
 
     if (bPartExists) {
         int rpcStatus;
@@ -1653,7 +1653,7 @@
     if (error) {
         if (bMarkPartial) {
             // Remove the part file if it's smaller than the minimum keep size.
-            const unsigned int size = m_slave->config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const unsigned int size = m_slave->configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (writeArgs.offset <  size) {
                 if (!remove(partFilePath)) {
                     qCDebug(LOG_KIO_NFS) << "Could not remove part file, ignoring...";
diff --git a/sftp/kio_sftp.cpp b/sftp/kio_sftp.cpp
--- a/sftp/kio_sftp.cpp
+++ b/sftp/kio_sftp.cpp
@@ -1658,7 +1658,7 @@
     sftp_attributes sb = sftp_lstat(mSftp, dest_orig_c.constData());
     const bool bOrigExists = (sb != nullptr);
     bool bPartExists = false;
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = configValue(QStringLiteral("MarkPartial"), true);
 
     // Don't change permissions of the original file
     if (bOrigExists) {
@@ -1808,7 +1808,7 @@
 
             sftp_attributes attr = sftp_stat(mSftp, dest.constData());
             if (bMarkPartial && attr != nullptr) {
-                size_t size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+                size_t size = configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
                 if (attr->size < size) {
                     sftp_unlink(mSftp, dest.constData());
                 }
@@ -1952,7 +1952,7 @@
     const QString sPart = sCopyFile + QLatin1String(".part"); // do we have a ".part" file?
     QFileInfo partFile(sPart);
     const bool bPartExists = partFile.exists();
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = configValue(QStringLiteral("MarkPartial"), true);
     const QString dest = (bMarkPartial ? sPart : sCopyFile);
 
     if (bMarkPartial && bPartExists && copyFile.size() > 0) {
@@ -2022,7 +2022,7 @@
         }
         else{
             partFile.refresh();
-            const int size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const int size = configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (partFile.exists() && partFile.size() <  size) { // should a very small ".part" be deleted?
                 QFile::remove(sPart);
             }
diff --git a/smb/kio_smb_dir.cpp b/smb/kio_smb_dir.cpp
--- a/smb/kio_smb_dir.cpp
+++ b/smb/kio_smb_dir.cpp
@@ -251,7 +251,7 @@
     bool bResume = false;
     const QFileInfo partInfo (dstFile + QLatin1String(".part"));
     const bool bPartExists = partInfo.exists();
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = configValue(QStringLiteral("MarkPartial"), true);
 
     if (bMarkPartial && bPartExists && partInfo.size() > 0) {
       if (partInfo.isDir()) {
@@ -389,7 +389,7 @@
     if (isErr) {
         const QString sPart = partInfo.absoluteFilePath();
         if (bMarkPartial) {
-            const int size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const int size = configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             if (partInfo.size() <  size) {
                 QFile::remove(sPart);
             }
@@ -462,7 +462,7 @@
 
     bool bResume = false;
     bool bPartExists = false;
-    const bool bMarkPartial = config()->readEntry("MarkPartial", true);
+    const bool bMarkPartial = configValue(QStringLiteral("MarkPartial"), true);
     const SMBUrl dstOrigUrl (kdst);
 
     if (bMarkPartial) {
@@ -576,7 +576,7 @@
     // Handle error condition.
     if (isErr) {
         if (bMarkPartial) {
-            const int size = config()->readEntry("MinimumKeepSize", DEFAULT_MINIMUM_KEEP_SIZE);
+            const int size = configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
             const int errNum = cache_stat(dstUrl, &st);
             if (errNum == 0 && st.st_size < size) {
                 smbc_unlink(dstUrl.toSmbcUrl());