diff --git a/README.md b/README.md
index df018b2..c2b36db 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ Iosevka’s default ligation set is assigned to `calt` feature, though not all o
 
 To build Iosevka you should:
 
-1. Ensure that [`node`](http://nodejs.org) (≥ 5.0), [`FontForge`](http://fontforge.org) (with Python scripting support, ≥ Aug. 2015 release), [`ttfautohint`](http://www.freetype.org/ttfautohint/), [`otfcc`](https://github.com/caryll/otfcc) (≥ 0.1.6) and `make` are runnable in your terminal.
+1. Ensure that [`node`](http://nodejs.org) (≥ 5.0), [`FontForge`](http://fontforge.org) (with Python scripting support, ≥ Aug. 2015 release), [`ttfautohint`](http://www.freetype.org/ttfautohint/), [`otfcc`](https://github.com/caryll/otfcc) (≥ 0.2.2) and `make` are runnable in your terminal.
    - Windows users may need to install MinGW and make \*nix utilities accessible (`mkdir.exe`, `cp.exe`, `cat.exe` and `rm.exe`, in particular) from Command Prompt. Utilities provided by [Git for Windows](https://git-for-windows.github.io/) works fine.
 2. Install necessary libs by `npm install`.
 3. `make`.
diff --git a/onegroup.mk b/onegroup.mk
index 2d931e3..8484756 100644
--- a/onegroup.mk
+++ b/onegroup.mk
@@ -110,9 +110,8 @@ $(PASS1) : $(OBJDIR)/.pass1-%.ttf : pass1-cleanup.py $(OBJDIR)/.pass0-%.svg
 	@$(HINT) $@.a.ttf $@
 	@-rm $@.a.ttf
 # Pass 2 : add metadata
-# IDKY, but converting into TTX and convert back dramatically reduces the file size
 $(TARGETS) : $(OBJDIR)/%.ttf : pass2-finalize.js $(OBJDIR)/.pass1-%.ttf $(OBJDIR)/.pass0-%.fdt
-	@otfccdump $(word 2,$^) | $(NODE) $< $(word 3,$^) | otfccbuild -o $@ --ignore-glyph-order --keep-average-char-width --dummy-dsig --short-post $(HINT_SUFFIX)
+	@otfccdump $(word 2,$^) | $(NODE) $< $(word 3,$^) | otfccbuild -s -O3 -o $@ --keep-average-char-width $(HINT_SUFFIX)
 
 $(DISTTARGETS) : $(DISTDIR)/%.ttf : $(OBJDIR)/%.ttf
 	@cp $< $@