diff --git a/CHANGELOG.md b/CHANGELOG.md
index 357999f..0ff24eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,9 @@ Features:
 * The `csv` method now supports all of the Ruby CSV options (e.g. `col_sep`, `quote_char`). These options simply get passed through to Ruby, so as they change in Ruby, so the support changes in Squib. (#149) Special thanks to Qgel's initial pull request (#146).
 * New `use_layout` method will allow you to load a layout file as a DSL method instead of in the constructor. Useful in conjunction with build groups! (#141)
 
+Bugs:
+* The `save_pdf` method will flush to file upon exit so that the PDF is available immediately. (#150, thanks for the bug report Qgel!)
+
 Chores:
 * Switched to `require_relative` internally throughout the codebase to be more pry-friendly (#130)
 * Rewrote the entire API doc and placed it on [squib.readthedocs.org](http://squib.readthedocs.org). :tada:
diff --git a/lib/squib/graphics/save_doc.rb b/lib/squib/graphics/save_doc.rb
index 628922d..af82b3d 100644
--- a/lib/squib/graphics/save_doc.rb
+++ b/lib/squib/graphics/save_doc.rb
@@ -43,6 +43,7 @@ module Squib
           end
         end
       end
+      cc.target.finish
     end
 
     # :nodoc:
diff --git a/spec/data/samples/custom_config.rb.txt b/spec/data/samples/custom_config.rb.txt
index 46262a3..0cc07a6 100644
--- a/spec/data/samples/custom_config.rb.txt
+++ b/spec/data/samples/custom_config.rb.txt
@@ -55,3 +55,4 @@ cairo: set_source([MockDouble, 0, 0])
 cairo: paint([])
 cairo: reset_clip([])
 cairo: translate([-75, -75])
+surface: finish([])
diff --git a/spec/data/samples/saves.rb.txt b/spec/data/samples/saves.rb.txt
index 5c51e97..571d5a7 100644
--- a/spec/data/samples/saves.rb.txt
+++ b/spec/data/samples/saves.rb.txt
@@ -634,6 +634,7 @@ cairo: paint([])
 cairo: reset_clip([])
 cairo: translate([-2343, -1131])
 cairo: show_page([])
+surface: finish([])
 cairo: scale([0.24, 0.24])
 cairo: translate([75, 75])
 cairo: rectangle([0, 0, 825, 1125])
@@ -650,6 +651,7 @@ cairo: paint([])
 cairo: reset_clip([])
 cairo: translate([-900, -75])
 cairo: show_page([])
+surface: finish([])
 surface: write_to_png(["_output/saves_notrim_01.png"])
 cairo: set_source([MockDouble, -37, -37])
 cairo: paint([])
diff --git a/spec/graphics/graphics_save_doc_spec.rb b/spec/graphics/graphics_save_doc_spec.rb
index bb0f793..38d0e5c 100644
--- a/spec/graphics/graphics_save_doc_spec.rb
+++ b/spec/graphics/graphics_save_doc_spec.rb
@@ -4,7 +4,8 @@ require 'squib'
 describe Squib::Deck, '#save_pdf' do
 
   context 'typical inputs' do
-    let(:cxt) { double(Cairo::Context) }
+    let(:cxt)    { double(Cairo::Context) }
+    let(:target) { double(Cairo::PDFSurface) }
 
     def expect_card_place(x, y)
       expect(cxt).to receive(:translate).with(x, y).once
@@ -41,6 +42,8 @@ describe Squib::Deck, '#save_pdf' do
       expect_card_place(2343, 1131)
       expect(cxt).to receive(:show_page).once
       expect_card_place(75, 75)
+      expect(cxt).to receive(:target).and_return(target)
+      expect(target).to receive(:finish).once
 
       args = { file: 'foo.pdf', dir: '_out', margin: 75, gap: 5, trim: 37 }
       deck.save_pdf(args)
@@ -59,6 +62,9 @@ describe Squib::Deck, '#save_pdf' do
       expect_card_place(831, 75)
       expect_card_place(1587, 75)
 
+      expect(cxt).to receive(:target).and_return(target)
+      expect(target).to receive(:finish).once
+
       deck.save_pdf(args)
     end
 
diff --git a/spec/samples/samples_regression_spec.rb b/spec/samples/samples_regression_spec.rb
index 4326074..e0f4c9d 100644
--- a/spec/samples/samples_regression_spec.rb
+++ b/spec/samples/samples_regression_spec.rb
@@ -3,7 +3,7 @@ require 'squib'
 require 'pp'
 
 describe 'Squib samples' do
-  
+
   around(:each) do |example|
     Dir.chdir(samples_dir) do
       example.run
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 5654e17..3dcfce1 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -128,7 +128,7 @@ def mock_cairo(strio)
     allow(font).to receive(m) { |*args| strio << scrub_hex("pango font: #{m}(#{args})\n") }
   end
 
-  %w(write_to_png).each do |m|
+  %w(write_to_png finish).each do |m|
     allow(surface).to receive(m) { |*args| strio << scrub_hex("surface: #{m}(#{args})\n") }
   end