diff --git a/development/Win32/packaging/installer/ChangeLog.txt b/development/Win32/packaging/installer/ChangeLog.txt
index 0a276cf21b..61cd73d4d6 100644
--- a/development/Win32/packaging/installer/ChangeLog.txt
+++ b/development/Win32/packaging/installer/ChangeLog.txt
@@ -1,5 +1,16 @@
-Changelog for LyX-230-RC2:
+Changelog for LyX-230-1:
+- installs LyX 2.3.0
+- fix installation of Arabic spell checker
+- updated to MiKTeX 2.9 build 6615
+- new thesaurus for Arabic
+- updated thesaurus for Ukrainian
+- updated spell checker dictionaries for Arabic, Breton and Ukrainian
+
+
+Changelog for LyX-230-RC2:
 - installs LyX 2.3.0 RC2
+- updated to Qt 5.9.4
+- updated to ImageMagick 7.0.7-22
 
 
 Changelog for LyX-230-RC1:
diff --git a/development/Win32/packaging/installer/DictionaryMirrors.txt b/development/Win32/packaging/installer/DictionaryMirrors.txt
index 434ea15c65..99a459087e 100644
--- a/development/Win32/packaging/installer/DictionaryMirrors.txt
+++ b/development/Win32/packaging/installer/DictionaryMirrors.txt
@@ -1,29 +1,22 @@
-dfn
+astuteinternet
+ayera
+cfhcable
+cytranet
+excellmedia
 freefr
-cznic
-garr
-optimate
-kaz
-kent
-heanet
-hivelocity
-ignum
-internode
 iweb
 jaist
-netcologne
-switch
+kent
+liquidtelecom
 nchc
-ncu
-skylink
-tcpdiag
-tenet
-ufpr
-waia
-colocrossing
-citylan
-aarnet
+netcologne
+netix
+netcologne
+newcontinuum
+phoenixnap
+razaoinfo
 superb-dca2
-superb-dca3
-softlayer-ams
-softlayer-dal
+superb-sea2
+ufpr
+versaweb
+vorboss
diff --git a/development/Win32/packaging/installer/HunspellDictionaryNames.txt b/development/Win32/packaging/installer/HunspellDictionaryNames.txt
index ff7b1039b8..817adc9472 100644
--- a/development/Win32/packaging/installer/HunspellDictionaryNames.txt
+++ b/development/Win32/packaging/installer/HunspellDictionaryNames.txt
@@ -1,7 +1,7 @@
 af_ZA.aff
 af_ZA.dic
-ar_DZ.aff
-ar_DZ.dic
+ar_SA.aff
+ar_SA.dic
 be_BY.aff
 be_BY.dic
 bg_BG.aff
diff --git a/development/Win32/packaging/installer/Packages.txt b/development/Win32/packaging/installer/Packages.txt
index 552a2d857e..3ba3f1e71b 100644
--- a/development/Win32/packaging/installer/Packages.txt
+++ b/development/Win32/packaging/installer/Packages.txt
@@ -3,6 +3,7 @@ l3packages
 l3experimental
 ctablestack
 babel-albanian
+babel-azerbaijani
 babel-basque
 babel-belarusian
 babel-bosnian
@@ -13,12 +14,15 @@ babel-croatian
 babel-czech
 babel-danish
 babel-dutch
+babel-english
 babel-esperanto
 babel-estonian
 babel-finnish
+babel-french
 babel-friulan
 babel-galician
 babel-georgian
+babel-german
 babel-greek
 babel-hebrew
 babel-hungarian
@@ -32,6 +36,7 @@ babel-kurmanji
 babel-latin
 babel-latvian
 babel-macedonian
+babel-malay
 babel-norsk
 babel-piedmontese
 babel-polish
@@ -46,6 +51,7 @@ babel-serbianc
 babel-slovak
 babel-slovenian
 babel-sorbian
+babel-spanish
 babel-swedish
 babel-thai
 babel-turkish
diff --git a/development/Win32/packaging/installer/ThesaurusDictionaryNames.txt b/development/Win32/packaging/installer/ThesaurusDictionaryNames.txt
index 6d19dfa053..27e248f6e3 100644
--- a/development/Win32/packaging/installer/ThesaurusDictionaryNames.txt
+++ b/development/Win32/packaging/installer/ThesaurusDictionaryNames.txt
@@ -1,3 +1,5 @@
+th_ar_SA_v2.dat
+th_ar_SA_v2.idx
 th_bg_BG_v2.dat
 th_bg_BG_v2.idx
 th_ca_ES_v2.dat
diff --git a/development/Win32/packaging/installer/include/dictionaries.nsh b/development/Win32/packaging/installer/include/dictionaries.nsh
index 8119a06eae..415b19cad9 100644
--- a/development/Win32/packaging/installer/include/dictionaries.nsh
+++ b/development/Win32/packaging/installer/include/dictionaries.nsh
@@ -43,8 +43,8 @@ Function FindDictionaries
   
   # read out the possible thesaurus filenames from the file	
   FileOpen $R5 "$INSTDIR\Resources\ThesaurusDictionaryNames.txt" r
-  ${for} $5 1 27
-   # the file has 54 lines, but we only need to check for one of the 2 thesaurus files per language
+  ${for} $5 1 28
+   # the file has 56 lines, but we only need to check for one of the 2 thesaurus files per language
    # therefore check only for every second line
    FileRead $R5 $String # $String is now the dictionary name
    FileRead $R5 $String # $String is now the dictionary name
@@ -77,11 +77,11 @@ Function DownloadHunspellDictionaries
    # if first download repository is not available try the other ones listed in "DictionaryMirrors.txt"
    FileOpen $R4 "$INSTDIR\Resources\DictionaryMirrors.txt" r
    
-   ${For} $4 1 29 # there are 29 mirrors in the file
+   ${For} $4 1 22 # there are 22 mirrors in the file
     FileRead $R4 $Search # $Search is now the mirror
     StrCpy $Search $Search -2 # delete the linebreak characters at the end
     Push $R0
-    inetc::get /TIMEOUT=5000 "http://$Search.dl.sourceforge.net/project/lyxwininstaller/hunspell/$String" "$INSTDIR\Resources\dicts\$String" /END
+    inetc::get /TIMEOUT=5000 "https://$Search.dl.sourceforge.net/project/lyxwininstaller/hunspell/$String" "$INSTDIR\Resources\dicts\$String" /END
     Pop $R0
     ${if} $R0 == "OK"
      ${ExitFor}
@@ -112,7 +112,7 @@ Function DownloadThesaurusDictionaries
  
  # read out the locations from the file	
  FileOpen $R5 "$INSTDIR\Resources\ThesaurusDictionaryNames.txt" r
- ${For} $5 1 54 # the file has 52 lines
+ ${For} $5 1 56 # the file has 56 lines
  
   FileRead $R5 $String # $String is now the thesaurus name
   StrCpy $R3 $String 5 3 # $R3 is now the thesaurus language code
@@ -123,11 +123,11 @@ Function DownloadThesaurusDictionaries
    # if first download repository is not available try the other ones listed in "DictionaryMirrors.txt"
    FileOpen $R4 "$INSTDIR\Resources\DictionaryMirrors.txt" r
    
-   ${For} $4 1 29 # there are 29 mirrors in the file
+   ${For} $4 1 22 # there are 22 mirrors in the file
     FileRead $R4 $Search # $Search is now the mirror
     StrCpy $Search $Search -2 # delete the linebreak characters at the end
     Push $R0
-    inetc::get /TIMEOUT=5000 "http://$Search.dl.sourceforge.net/project/lyxwininstaller/thesaurus/$String" "$INSTDIR\Resources\thes\$String" /END
+    inetc::get /TIMEOUT=5000 "https://$Search.dl.sourceforge.net/project/lyxwininstaller/thesaurus/$String" "$INSTDIR\Resources\thes\$String" /END
     Pop $R0
     ${if} $R0 == "OK"
      ${ExitFor}
diff --git a/development/Win32/packaging/installer/include/init.nsh b/development/Win32/packaging/installer/include/init.nsh
index 55f76445b6..85e1350ff0 100644
--- a/development/Win32/packaging/installer/include/init.nsh
+++ b/development/Win32/packaging/installer/include/init.nsh
@@ -73,8 +73,8 @@ Section /o "Afrikaans" SecDAfrikaans
 SectionEnd
 
 Section /o "العربية" SecDArabic
- StrCpy $DictCodes "ar_DZ,$DictCodes"
- AddSize 2500
+ StrCpy $DictCodes "ar_SA,$DictCodes"
+ AddSize 7304
 SectionEnd
 
 Section /o "հայերեն" SecDArmenian
@@ -99,7 +99,7 @@ SectionEnd
 
 Section /o "Brezhoneg" SecDBreton 
  StrCpy $DictCodes "br_FR,$DictCodes"
- AddSize 5510
+ AddSize 5556
 SectionEnd
 
 Section /o "български" SecDBulgarian
@@ -426,7 +426,7 @@ SectionEnd
 
 Section /o "Українська" SecDUkrainian
  StrCpy $DictCodes "uk_UA,$DictCodes"
- AddSize 5555
+ AddSize 6375
 SectionEnd
 
 Section /o "اردو" SecDUrdu
@@ -444,6 +444,11 @@ SectionGroupEnd
 
 SectionGroup "$(SecThesaurus)" SecThesaurus
 
+Section /o "العربية" SecTArabic
+ StrCpy $ThesCodes "ar_SA,$ThesCodes"
+ AddSize 799
+SectionEnd
+
 Section /o "български" SecTBulgarian
  StrCpy $ThesCodes "bg_BG,$ThesCodes"
  AddSize 3020
@@ -726,7 +731,7 @@ Function .onInit
    SectionSetFlags ${SecDAfrikaans} $0
    SectionSetSize ${SecDAfrikaans} 0
   ${endif}
-  StrCpy $Search "ar_DZ"
+  StrCpy $Search "ar_SA"
   Call StrPoint
   ${if} $Pointer != "-1"
    IntOp $0 ${SF_SELECTED} | ${SF_RO}
@@ -1228,8 +1233,15 @@ Function .onInit
   # select sections of already installed thesaurus dictionaries, make them read-only
   # and set the necessary size to 0 bytes
   StrCpy $String $FoundThes
-  StrCpy $Search "bg_BG"
+  StrCpy $Search "ar_SA"
   Call StrPoint # function from LyXUtils.nsh
+  ${if} $Pointer != "-1"
+   IntOp $0 ${SF_SELECTED} | ${SF_RO}
+   SectionSetFlags ${SecTArabic} $0
+   SectionSetSize ${SecTArabic} 0
+  ${endif}
+  StrCpy $Search "bg_BG"
+  Call StrPoint
   ${if} $Pointer != "-1"
    IntOp $0 ${SF_SELECTED} | ${SF_RO}
    SectionSetFlags ${SecTBulgarian} $0
diff --git a/development/Win32/packaging/installer/settings.nsh b/development/Win32/packaging/installer/settings.nsh
index ff8029fa1e..0d94fc7fc7 100644
--- a/development/Win32/packaging/installer/settings.nsh
+++ b/development/Win32/packaging/installer/settings.nsh
@@ -45,13 +45,13 @@ These typically need to be modified for each LyX release
 #--------------------------------
 # MiKTeX and JabRef
 
-!define MiKTeXRepo "ftp://ftp.fernuni-hagen.de/pub/mirrors/www.ctan.org/systems/win32/miktex/tm/packages/"
+!define MiKTeXRepo "ftp://ftp.tu-chemnitz.de/pub/tex/systems/win32/miktex/tm/packages/"
 
 !define MiKTeXDeliveredVersion "2.9"
 !define ImageMagickVersion "7.0.7"
  
 # definitions for the Complete installer
 !if ${SETUPTYPE} == BUNDLE
- !define MiKTeXInstall "$INSTDIR\external\basic-miktex-2.9.6520.exe"
+ !define MiKTeXInstall "$INSTDIR\external\basic-miktex-2.9.6615.exe"
 !endif
 
diff --git a/development/Win32/packaging/installer/setup/configure.nsh b/development/Win32/packaging/installer/setup/configure.nsh
index 80585073a2..3de31b3e97 100644
--- a/development/Win32/packaging/installer/setup/configure.nsh
+++ b/development/Win32/packaging/installer/setup/configure.nsh
@@ -245,14 +245,14 @@ Section -ConfigureScript
     # call the non-admin version
     # at first we need to synchronize the package database
     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--update-db"'
-    nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+    nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--require=@$INSTDIR\Resources\Packages.txt"'
    ${else}
     ${if} $MiKTeXUser != "HKCU" # call the admin version
      nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--update-db"'
-     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--admin" "--verbose" "--require=@$INSTDIR\Resources\Packages.txt"'
     ${else}
      nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--update-db"'
-     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--install-some=$INSTDIR\Resources\Packages.txt"'
+     nsExec::ExecToLog '"$PathLaTeX\mpm.exe" "--verbose" "--require=@$INSTDIR\Resources\Packages.txt"'
     ${endif}
    ${endif}
   ${endif}