diff --git a/resources/scripts/7za b/resources/scripts/7za
index 47f412575..9c10723bf 160000
--- a/resources/scripts/7za
+++ b/resources/scripts/7za
@@ -1 +1 @@
-Subproject commit 47f4125753452eff8800dbd6600c5a05540b15d9
+Subproject commit 9c10723bfbaf6cb85107d6ee16e0324e9e487749
diff --git a/src/librssguard/core/feedsproxymodel.cpp b/src/librssguard/core/feedsproxymodel.cpp
index 61573185c..e57ba1fd5 100644
--- a/src/librssguard/core/feedsproxymodel.cpp
+++ b/src/librssguard/core/feedsproxymodel.cpp
@@ -21,9 +21,8 @@ FeedsProxyModel::FeedsProxyModel(FeedsModel* source_model, QObject* parent)
   setRecursiveFilteringEnabled(true);
 #endif
 
-  setFilterCaseSensitivity(Qt::CaseSensitivity::CaseInsensitive);
-  setFilterKeyColumn(-1);
-  setFilterRole(Qt::ItemDataRole::EditRole);
+  setFilterKeyColumn(FDS_MODEL_TITLE_INDEX);
+  setFilterRole(LOWER_TITLE_ROLE);
 
   setDynamicSortFilter(true);
   setSourceModel(m_sourceModel);
diff --git a/src/librssguard/core/messagesmodel.cpp b/src/librssguard/core/messagesmodel.cpp
index 2df972cf6..5dd9a1fa9 100644
--- a/src/librssguard/core/messagesmodel.cpp
+++ b/src/librssguard/core/messagesmodel.cpp
@@ -324,8 +324,13 @@ QVariant MessagesModel::data(const QModelIndex& idx, int role) const {
       }
     }
 
+    case LOWER_TITLE_ROLE:
+      return messageAt(idx.row()).m_title.toLower();
+
     case Qt::ItemDataRole::EditRole:
-      return m_cache->containsData(idx.row()) ? m_cache->data(idx) : QSqlQueryModel::data(idx, role);
+      return m_cache->containsData(idx.row())
+          ? m_cache->data(idx)
+          : QSqlQueryModel::data(idx, role);
 
     case Qt::ItemDataRole::ToolTipRole: {
       if (idx.column() == MSG_DB_SCORE_INDEX) {
diff --git a/src/librssguard/core/messagesproxymodel.cpp b/src/librssguard/core/messagesproxymodel.cpp
index da86f19d5..59c92bde7 100644
--- a/src/librssguard/core/messagesproxymodel.cpp
+++ b/src/librssguard/core/messagesproxymodel.cpp
@@ -17,9 +17,8 @@ MessagesProxyModel::MessagesProxyModel(MessagesModel* source_model, QObject* par
   setSortRole(Qt::ItemDataRole::EditRole);
   setSortCaseSensitivity(Qt::CaseSensitivity::CaseInsensitive);
 
-  setFilterCaseSensitivity(Qt::CaseSensitivity::CaseInsensitive);
-  setFilterKeyColumn(-1);
-  setFilterRole(Qt::ItemDataRole::EditRole);
+  setFilterKeyColumn(MSG_DB_TITLE_INDEX);
+  setFilterRole(LOWER_TITLE_ROLE);
 
   setDynamicSortFilter(false);
   setSourceModel(m_sourceModel);
diff --git a/src/librssguard/definitions/definitions.h b/src/librssguard/definitions/definitions.h
index 3fcf4c828..98c0e6cef 100755
--- a/src/librssguard/definitions/definitions.h
+++ b/src/librssguard/definitions/definitions.h
@@ -57,6 +57,7 @@
 #define URL_REGEXP "^(http|https|feed|ftp):\\/\\/[\\w\\-_]+(\\.[\\w\\-_]+)+([\\w\\-\\.,@?^=%&:/~\\+#]*[\\w\\-\\@?^=%&/~\\+#])?$"
 #define SCRIPT_SOURCE_TYPE_REGEXP             "^.+#.*$"
 #define TEXT_TITLE_LIMIT                      30
+#define LOWER_TITLE_ROLE                      64
 #define RESELECT_MESSAGE_THRESSHOLD           500
 #define ICON_SIZE_SETTINGS                    16
 #define TRAY_ICON_BUBBLE_TIMEOUT              20000
diff --git a/src/librssguard/gui/feedsview.cpp b/src/librssguard/gui/feedsview.cpp
index 09a257e38..c60c67250 100755
--- a/src/librssguard/gui/feedsview.cpp
+++ b/src/librssguard/gui/feedsview.cpp
@@ -498,9 +498,9 @@ void FeedsView::switchVisibility() {
 
 void FeedsView::filterItems(const QString& pattern) {
 #if QT_VERSION < 0x050C00 // Qt < 5.12.0
-  m_proxyModel->setFilterRegExp(pattern);
+  m_proxyModel->setFilterRegExp(pattern.toLower());
 #else
-  m_proxyModel->setFilterRegularExpression(pattern);
+  m_proxyModel->setFilterRegularExpression(pattern.toLower());
 #endif
 
   if (!pattern.simplified().isEmpty()) {
diff --git a/src/librssguard/gui/messagesview.cpp b/src/librssguard/gui/messagesview.cpp
index 8f61bd3f0..f27a57d4f 100644
--- a/src/librssguard/gui/messagesview.cpp
+++ b/src/librssguard/gui/messagesview.cpp
@@ -581,9 +581,9 @@ void MessagesView::selectNextUnreadItem() {
 
 void MessagesView::searchMessages(const QString& pattern) {
 #if QT_VERSION < 0x050C00 // Qt < 5.12.0
-  m_proxyModel->setFilterRegExp(pattern);
+  m_proxyModel->setFilterRegExp(pattern.toLower());
 #else
-  m_proxyModel->setFilterRegularExpression(pattern);
+  m_proxyModel->setFilterRegularExpression(pattern.toLower());
 #endif
 
   if (selectionModel()->selectedRows().isEmpty()) {
diff --git a/src/librssguard/services/abstract/rootitem.cpp b/src/librssguard/services/abstract/rootitem.cpp
index 53e57e54d..b787549ea 100644
--- a/src/librssguard/services/abstract/rootitem.cpp
+++ b/src/librssguard/services/abstract/rootitem.cpp
@@ -148,6 +148,9 @@ QVariant RootItem::data(int column, int role) const {
         return QVariant();
       }
 
+    case LOWER_TITLE_ROLE:
+      return m_title.toLower();
+
     case Qt::ItemDataRole::EditRole:
       if (column == FDS_MODEL_TITLE_INDEX) {
         return m_title;