diff --git a/alexandria-0.7.8-explicitly-specify_gem_image_size.patch b/alexandria-0.7.8-explicitly-specify_gem_image_size.patch
new file mode 100644
index 0000000..9230b9a
--- /dev/null
+++ b/alexandria-0.7.8-explicitly-specify_gem_image_size.patch
@@ -0,0 +1,10 @@
+--- alexandria-book-collection-manager-0.7.8/lib/alexandria/export_library.rb.image_size	2020-11-29 20:50:34.000000000 +0900
++++ alexandria-book-collection-manager-0.7.8/lib/alexandria/export_library.rb	2021-08-27 11:09:49.794917238 +0900
+@@ -5,6 +5,7 @@
+ # See the file README.md for authorship and licensing information.
+ 
+ require "csv"
++gem "image_size"
+ require "image_size"
+ require "tmpdir"
+ 
diff --git a/alexandria.spec b/alexandria.spec
index 94094e2..861093b 100644
--- a/alexandria.spec
+++ b/alexandria.spec
@@ -7,14 +7,14 @@ BuildRequires:  %{*} \
 %undefine		minorver	
 %undefine		ifpre	
 
-%define		fedorarel	5
+%define		fedorarel	6
 %define		rel		%{?ifpre:0.}%{fedorarel}%{?minorver:.%minorver}
 
 
 
 Name:		alexandria
 Version:	%{majorver}
-Release:	%{rel}%{?dist}.1
+Release:	%{rel}%{?dist}
 Summary:	Book collection manager
 
 License:	GPLv2+
@@ -82,6 +82,8 @@ Patch31:	alexandria-0.7.4-remove-undefined-method.patch
 # Once reset search text when adding new book (bug 1909500)
 # https://github.com/mvz/alexandria-book-collection-manager/issues/106
 Patch32:	alexandria-0.7.8-reset-search-when-adding-new-book.patch
+# Explicitly specify image_size gem
+Patch33:	alexandria-0.7.8-explicitly-specify_gem_image_size.patch
 
 BuildArch:	noarch
 
@@ -120,8 +122,7 @@ BuildRequires:	gstreamer1-plugins-good
 %BothRequires	rubygem(gettext)
 %BothRequires	rubygem(hpricot)
 %BothRequires	rubygem(htmlentities)
-# TODO: alexandria now uses toy/image_size, need new review request
-%BothRequires	ruby(imagesize)
+%BothRequires	rubygem(image_size)
 # Dependency removed on 0.6.4b1
 #Requires:	ruby(mechanize)
 # Kill ruby(revolution) dependency
@@ -180,6 +181,7 @@ Alexandria is a GNOME application to help you manage your book collection.
 %patch30 -p1 -b .utf8_2
 %patch31 -p1 -b .undefined_method
 %patch32 -p1 -b .reset_search
+%patch33 -p1 -b .image_size
 
 # Embed Fedora EVR
 %{__sed} -i.evr \
@@ -207,9 +209,6 @@ rake install_package_staging \
 	RUBYLIBDIR=%{ruby_vendorlibdir}
 
 desktop-file-install \
-%if 0%{?fedora} < 19
-	--vendor fedora \
-%endif
 	--dir $RPM_BUILD_ROOT%{_datadir}/applications/ \
 	--delete-original \
 	$RPM_BUILD_ROOT%{_datadir}/applications/%{name}.desktop
@@ -293,7 +292,13 @@ touch FAKE/bundler/setup.rb
 touch FAKE/simplecov.rb
 export RUBYLIB=$(pwd)/FAKE
 
-ping -w3 www.google.co.jp || \
+ping -w3 www.google.co.jp && \
+	{
+		# This does not work, will be fixed in 0.7.9
+           # book_providers/web.rb: switching from Hpricot to Nokogiri seems needed
+		disable_test spec/alexandria/book_providers/thalia_provider_spec.rb "works when searching by ISBN";
+	} \
+	|| \
 	{
 		disable_test spec/alexandria/book_providers/thalia_provider_spec.rb "works when searching by ISBN";
 		disable_test spec/alexandria/book_providers_spec.rb "works for a book with ASCII title";
@@ -301,19 +306,6 @@ ping -w3 www.google.co.jp || \
 		sed -i spec/alexandria/book_providers_spec.rb -e "\@Alexandria::BookProviders::SBNProvider@{n;s|it|xit|}";
 	}
 
-# This one need image_size (not old imagesize)
-# Comment:
-%if 0
-  1) Alexandria::ExportLibrary#export_as_tellico_xml_archive can export unsorted
-     Failure/Error: image.add_attribute("format", image_s.format)
-
-     NoMethodError:
-       private method `format' called for #<ImageSize:0x00005651fefc6fb0>
-     # ./lib/alexandria/export_library.rb:257:in `block in to_tellico_document'
-%endif
-sed -i.testsuite spec/alexandria/export_library_spec.rb \
-	-e "\@message.*export_as_tellico_xml_archive@{n;n;s|it|xit|}"
-
 xvfb-run \
 	-s "-screen 0 640x480x24" \
 	rake spec:unit
@@ -359,6 +351,10 @@ done
 %{_datadir}/icons/hicolor/*/apps/%{name}.*
 
 %changelog
+* Fri Aug 27 2021 Mamoru TASAKA <mtasaka@fedoraproject.org> - 0.7.8-6
+- Switch to image_size gem, specify explicitly
+- Disable 1 failing test
+
 * Wed Jul 21 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.7.8-5.1
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild