diff --git a/exe/IHP/IDE/DevServer.hs b/exe/IHP/IDE/DevServer.hs
index a309d01a1..572bda68b 100644
--- a/exe/IHP/IDE/DevServer.hs
+++ b/exe/IHP/IDE/DevServer.hs
@@ -213,7 +213,7 @@ stopFileWatcher _ = pure ()
 
 startGHCI :: IO ManagedProcess
 startGHCI = do
-    let args = ["-threaded", "-fomit-interface-pragmas", "-j", "-O0", "+RTS", "-A512m", "-n4m", "-H512m", "-G3", "-qg"]
+    let args = ["-threaded", "-fomit-interface-pragmas", "-j", "-O0", "+RTS", "-A512m", "-n4m", "-H512m", "-G3", "-qg", "-N"]
     createManagedProcess (Process.proc "ghci" args)
             { Process.std_in = Process.CreatePipe
             , Process.std_out = Process.CreatePipe
diff --git a/ihp.cabal b/ihp.cabal
index e0fc3f293..439a69b86 100644
--- a/ihp.cabal
+++ b/ihp.cabal
@@ -269,6 +269,7 @@ executable RunDevServer
     build-depends: IHPFramework
     hs-source-dirs: exe
     main-is: IHP/IDE/DevServer.hs
+    ghc-options: -funfolding-use-threshold=16 -optc-O3 -funbox-strict-fields -fconstraint-solver-iterations=100 -fexpose-all-unfoldings -flate-dmd-anal -fspec-constr-keen -fspecialise-aggressively -fstatic-argument-transformation -fmax-worker-args=200 -threaded -haddock  -fmax-worker-args=200 -fstatic-argument-transformation -with-rtsopts=-A512m -with-rtsopts=-n4m -with-rtsopts=-N
 
 executable new-application
     import: shared-properties
diff --git a/lib/IHP/Makefile.dist b/lib/IHP/Makefile.dist
index 0e55917c7..9475729a5 100644
--- a/lib/IHP/Makefile.dist
+++ b/lib/IHP/Makefile.dist
@@ -57,7 +57,7 @@ GHC_EXTENSIONS+= -XDerivingVia
 GHC_EXTENSIONS+= -Werror=missing-fields
 GHC_EXTENSIONS+= -fwarn-incomplete-patterns
 
-GHC_RTS_FLAGS := -A256m -n2m
+GHC_RTS_FLAGS := -A256m -n2m -N
 
 GHC_OPTIONS=-threaded -i. -ibuild -iConfig -iIHP
 GHC_OPTIONS+= ${GHC_EXTENSIONS}