diff --git a/src/backend/readmng.c b/src/backend/readmng.c
index 2fd2cf4..1c66981 100644
--- a/src/backend/readmng.c
+++ b/src/backend/readmng.c
@@ -28,11 +28,15 @@ G_DEFINE_TYPE (MgBackendReadmng, mg_backend_readmng, G_TYPE_OBJECT)
 
 static GParamSpec *mg_backend_readmng_properties[MG_BACKEND_READMNG_N_PROPERTIES] = { NULL, };
 
+static void
+mg_backend_readmng_dispose (GObject *object);
+
 static void
 mg_backend_readmng_class_init (MgBackendReadmngClass *class) {
     GObjectClass *object_class = G_OBJECT_CLASS (class);
     object_class->set_property = mg_backend_readmng_set_property;
     object_class->get_property = mg_backend_readmng_get_property;
+    object_class->dispose = mg_backend_readmng_dispose;
 
     mg_backend_readmng_properties[MG_BACKEND_READMNG_BASE_URL] = g_param_spec_string ("base_url",
             "BaseURL",
@@ -89,6 +93,16 @@ mg_backend_readmng_init (MgBackendReadmng *self) {
     }
     self->xml_utils = mg_util_xml_new ();
 }
+static void
+mg_backend_readmng_dispose (GObject *object) {
+    MgBackendReadmng *self = MG_BACKEND_READMNG (object);
+    g_clear_object (&self->xml_utils);
+    if (self->main_page_html) {
+        g_free (self->main_page_html);
+        self->main_page_html = NULL;
+    }
+    G_OBJECT_CLASS (mg_backend_readmng_parent_class)->dispose (object);
+}
 
 char *
 mg_backend_readmng_get_base_url (MgBackendReadmng *self) {
@@ -139,6 +153,8 @@ mg_backend_readmng_get_featured_manga (MgBackendReadmng *self) {
     xmlDocPtr html_document;
     html_document = mg_backend_readmng_fetch_xml_main_page (self);
     mangas = mg_backend_readmng_parse_main_page (self, html_document);
+
+    xmlFreeDoc (html_document);
     return mangas;
 
 }
@@ -157,7 +173,7 @@ mg_backend_readmng_retrieve_manga_details (MgBackendReadmng *self,
     size_t movie_detail_len = 0;
 
     if (mg_manga_has_details (manga)) {
-        return;
+        goto cleanup_mg_backend_readmng_retrieve_manga_details;
     }
     
     xml_utils = self->xml_utils;
@@ -168,7 +184,7 @@ mg_backend_readmng_retrieve_manga_details (MgBackendReadmng *self,
     node_set = xpath_result->nodesetval;
     if (!node_set) {
         fprintf(stderr, "No match\n");
-        return;
+        goto cleanup_mg_backend_readmng_retrieve_manga_details;
     }
     for (int i = 0; i < node_set->nodeNr; i++) {
         xmlNodePtr node = node_set->nodeTab[i];
@@ -182,6 +198,8 @@ mg_backend_readmng_retrieve_manga_details (MgBackendReadmng *self,
     manga_chapters = mg_backend_readmng_recover_chapter_list (self, html_document);
     mg_manga_set_chapter_list (manga, manga_chapters);
     mg_manga_details_recovered (manga);
+cleanup_mg_backend_readmng_retrieve_manga_details:
+    g_free (movie_detail);
 }
 
 static GListStore *
@@ -201,7 +219,7 @@ mg_backend_readmng_recover_chapter_list (MgBackendReadmng *self,
     node_set = xpath_result->nodesetval;
     if (!node_set) {
         fprintf(stderr, "No matching ul\n");
-        return return_value;
+        goto cleanup_mg_backend_readmng_recover_chapter_list;
     }
     for (int i = 0; i < node_set->nodeNr; i++) {
         xmlNodePtr node = node_set->nodeTab[i];
@@ -210,7 +228,7 @@ mg_backend_readmng_recover_chapter_list (MgBackendReadmng *self,
     }
     if (!ul_len) {
         fprintf(stderr, "No matching chp_lst\n");
-        return return_value;
+        goto cleanup_mg_backend_readmng_recover_chapter_list;
     }
     ul = uls[0];
     for (xmlNodePtr li = ul->children; li; li = li->next) {
@@ -221,6 +239,10 @@ mg_backend_readmng_recover_chapter_list (MgBackendReadmng *self,
             }
         }
     }
+cleanup_mg_backend_readmng_recover_chapter_list:
+    if (uls) {
+        g_free (uls);
+    }
     return return_value;
 }
 
@@ -282,6 +304,7 @@ mg_backend_readmng_fetch_xml_details (MgBackendReadmng *self,
 
     char *html_response = mg_util_soup_get_request (util_soup,
             request_url, &response_len);
+    g_object_unref (util_soup);
     return htmlReadMemory (html_response, response_len, NULL, NULL,
             HTML_PARSE_RECOVER | HTML_PARSE_NODEFDTD
             | HTML_PARSE_NOERROR | HTML_PARSE_NOWARNING );
@@ -307,6 +330,7 @@ mg_backend_readmng_get_main_page (MgBackendReadmng *self, size_t *len) {
         MgUtilSoup *util_soup = mg_util_soup_new ();
         self->main_page_html = mg_util_soup_get_request (util_soup,
                 self->base_url, &self->main_page_html_len);
+        g_object_unref (util_soup);
     }
     if (len) {
         *len = self->main_page_html_len;
@@ -329,6 +353,7 @@ mg_backend_readmng_parse_main_page (MgBackendReadmng *self, const xmlDocPtr html
                 mangas, current_li);
 
     }
+    g_free (li);
     return mangas;
 }
 
@@ -368,7 +393,7 @@ mg_backend_readmng_retrieve_slides (MgBackendReadmng *self, const xmlDocPtr html
     node_set = xpath_result->nodesetval;
     if (!node_set) {
         fprintf(stderr, "No match\n");
-        return NULL;
+        goto cleanup_mg_backend_readmng_retrieve_slides;
     }
     for (int i = 0; i < node_set->nodeNr; i++) {
         xmlNodePtr node = node_set->nodeTab[i];
@@ -381,6 +406,8 @@ mg_backend_readmng_retrieve_slides (MgBackendReadmng *self, const xmlDocPtr html
     if (xpath_result) {
         xmlXPathFreeObject(xpath_result);
     }
+cleanup_mg_backend_readmng_retrieve_slides:
+    g_free (nodes);
     return slides;
 }
 
diff --git a/src/util/xml.c b/src/util/xml.c
index d701407..eee52f6 100644
--- a/src/util/xml.c
+++ b/src/util/xml.c
@@ -36,14 +36,15 @@ mg_util_xml_new () {
 xmlNodePtr *
 mg_util_xml_find_class (MgUtilXML *self, xmlNodePtr node, char *class,
         size_t *len, xmlNodePtr *nodes, int return_on_first) {
+    char *attr = NULL;
     for (xmlNodePtr child = node->children; child; child=child->next) {
-        char *attr = mg_util_xml_get_attr (self, child, "class");
+        attr = mg_util_xml_get_attr (self, child, "class");
         if (attr && mg_util_xml_has_class (self, attr, class)) {
             (*len)++;
             nodes = g_realloc (nodes, sizeof *nodes * *len);
             nodes[*len-1] = child;
             if (return_on_first) {
-                return nodes;
+                goto cleanup_mg_util_xml_find_class;
             }
         }
         if (node->children) {
@@ -52,11 +53,15 @@ mg_util_xml_find_class (MgUtilXML *self, xmlNodePtr node, char *class,
                 nodes = mg_util_xml_find_class (self, child, class,
                         len, nodes, return_on_first);
                 if (*len) {
-                    return nodes;
+                    goto cleanup_mg_util_xml_find_class;
                 }
             }
         }
     }
+cleanup_mg_util_xml_find_class:
+    if (attr) {
+        g_free (attr);
+    }
     return nodes;
 }
 
diff --git a/src/view/detail_manga.c b/src/view/detail_manga.c
index 6fcf9be..fafff58 100644
--- a/src/view/detail_manga.c
+++ b/src/view/detail_manga.c
@@ -26,7 +26,9 @@ reverse_list (GtkButton *reverse_button,
         g_list_store_append (new_model, MG_MANGA_CHAPTER
                 (g_list_model_get_item (G_LIST_MODEL (model), i)));
     }
-    gtk_single_selection_set_model (selection, G_LIST_MODEL (new_model));
+    GtkSingleSelection *new_selection = gtk_single_selection_new
+            (G_LIST_MODEL (new_model));
+    gtk_list_view_set_model (list_view, GTK_SELECTION_MODEL (new_selection));
     g_object_unref (G_OBJECT (model));
 }
 
@@ -62,8 +64,9 @@ create_detail_view (MgManga *manga) {
     GtkListView *chapter_list = NULL;
     GtkPicture *manga_image = create_picture_from_url (
             mg_manga_get_image_url(manga), 200);
+    char *manga_title_text = mg_manga_get_title (manga);
     char *title_text = mg_util_xml_get_title_text (
-            xml_util, mg_manga_get_title (manga));
+            xml_util, manga_title_text);
     char *description_text;
 
     scroll = gtk_scrolled_window_new ();
@@ -98,8 +101,12 @@ create_detail_view (MgManga *manga) {
     gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scroll), GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
 
     gtk_box_append (detail_view, GTK_WIDGET (toggle_folded_button));
-    gtk_box_append (detail_view, GTK_WIDGET (reverse_list_button));
     gtk_box_append (detail_view, scroll);
+    gtk_box_append (detail_view, GTK_WIDGET (reverse_list_button));
 
+    g_clear_object (&readmng);
+    g_free (manga_title_text);
+    g_free (title_text);
+    g_free (description_text);
     return detail_view;
 }
diff --git a/src/view/list_view_manga.c b/src/view/list_view_manga.c
index 8b8ec51..5efacd6 100644
--- a/src/view/list_view_manga.c
+++ b/src/view/list_view_manga.c
@@ -50,14 +50,16 @@ setup_list_view_mangas (GtkSignalListItemFactory *factory,
         gpointer user_data) {
     MgManga *manga = gtk_list_item_get_item (list_item);
     GtkBox *box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0));
+    char *manga_title = mg_manga_get_title (manga);
 
-    GtkWidget *label = gtk_label_new (mg_manga_get_title (manga));
+    GtkWidget *label = gtk_label_new (manga_title);
     GtkWidget *picture = GTK_WIDGET (
             create_picture_from_url (mg_manga_get_image_url(manga), 200));
 
     gtk_box_append (box, picture);
     gtk_box_append (box, label);
     gtk_list_item_set_child (list_item, GTK_WIDGET (box));
+    g_free (manga_title);
 }
 
 GtkListView *
diff --git a/src/view/main_view.c b/src/view/main_view.c
index 48b16a6..daab1a6 100644
--- a/src/view/main_view.c
+++ b/src/view/main_view.c
@@ -44,6 +44,7 @@ activate (AdwApplication *app,
     gtk_box_append (box, GTK_WIDGET (views_leaflet));
 
     gtk_widget_show (window);
+    g_clear_object (&readmng);
 }
 
 static GtkBox *
diff --git a/src/view/picture.c b/src/view/picture.c
index a06ac07..e8dbd78 100644
--- a/src/view/picture.c
+++ b/src/view/picture.c
@@ -7,7 +7,7 @@
 
 GtkPicture *
 create_picture_from_url (char *url, gint picture_height) {
-    GtkPicture *picture;
+    GtkPicture *picture = NULL;
     GFileIOStream *iostream;
     GFile *tmp_image;
     GError *error = NULL;
@@ -21,16 +21,19 @@ create_picture_from_url (char *url, gint picture_height) {
     tmp_image = g_file_new_tmp ("mangareadertmpfileXXXXXX", &iostream, &error);
     if (error) {
         fprintf (stderr, "Unable to read file: %s\n", error->message);
-        return NULL;
+        goto cleanup_create_picture_from_url;
     }
     error = NULL;
     g_output_stream_write (g_io_stream_get_output_stream (G_IO_STREAM (iostream)),
             downloaded_image, size_downloaded_image, NULL, &error);
     if (error) {
         fprintf (stderr, "Unable to write file: %s\n", error->message);
-        return NULL;
+        goto cleanup_create_picture_from_url;
     }
     picture = GTK_PICTURE (gtk_picture_new_for_file (tmp_image));
     g_object_set_property_int (G_OBJECT(picture), "height-request", picture_height);
+
+cleanup_create_picture_from_url:
+    g_free (downloaded_image);
     return picture;
 }