diff --git a/lib/squib/sprues/sprue.rb b/lib/squib/sprues/sprue.rb
index 3e907b6..c60f9d9 100644
--- a/lib/squib/sprues/sprue.rb
+++ b/lib/squib/sprues/sprue.rb
@@ -4,6 +4,7 @@ require_relative '../args/color_validator'
 require_relative '../args/unit_conversion'
 require_relative 'crop_line'
 require_relative 'crop_line_dash'
+require_relative 'sprue_schema'
 
 module Squib
   class Sprue
@@ -31,7 +32,7 @@ module Squib
     attr_reader :dpi
 
     def initialize(template_hash, dpi)
-      ClassyHash.validate(template_hash, SCHEMA)
+      ClassyHash.validate(template_hash, Sprues::SCHEMA)
       @template_hash = template_hash
       @dpi = dpi
       @crop_line_default = @template_hash['crop_line'].select do |k, _|
@@ -132,54 +133,6 @@ module Squib
 
     private
 
-    # Template file schema
-    UNIT_REGEX = /^(\d*[.])?\d+(in|cm|mm)$/
-    ROTATE_REGEX = /^(\d*[.])?\d+(deg|rad)?$/
-    SCHEMA = {
-      'sheet_width' => UNIT_REGEX,
-      'sheet_height' => UNIT_REGEX,
-      'card_width' => UNIT_REGEX,
-      'card_height' => UNIT_REGEX,
-      'position_reference' => ClassyHash::G.enum(:topleft, :center),
-      'rotate' => [
-        :optional, Numeric,
-        ClassyHash::G.enum(:clockwise, :counterclockwise, :turnaround),
-        ROTATE_REGEX
-      ],
-      'crop_line' => {
-        'style' => [
-          ClassyHash::G.enum(:solid, :dotted, :dashed),
-          Sprues::CropLineDash::VALIDATION_REGEX
-        ],
-        'width' => UNIT_REGEX,
-        'color' => [String, Symbol],
-        'overlay' => ClassyHash::G.enum(
-          :on_margin, :overlay_on_cards, :beneath_cards
-        ),
-        'lines' => [[{
-          'type' => ClassyHash::G.enum(:horizontal, :vertical),
-          'position' => UNIT_REGEX,
-          'style' => [
-            :optional, ClassyHash::G.enum(:solid, :dotted, :dashed)
-          ],
-          'width' => [:optional, UNIT_REGEX],
-          'color' => [:optional, String, Symbol],
-          'overlay_on_cards' => [:optional, TrueClass]
-        }]]
-      },
-      'cards' => [[{
-        'x' => UNIT_REGEX,
-        'y' => UNIT_REGEX,
-        # NOTE: Don't think that we should specify rotation on a per card
-        # basis, but just included here for now
-        'rotate' => [
-          :optional, Numeric,
-          ClassyHash::G.enum(:clockwise, :counterclockwise, :turnaround),
-          ROTATE_REGEX
-        ]
-      }]]
-    }.freeze
-
     # Return path for built-in sheet templates
     def self.builtin(file)
       "#{File.dirname(__FILE__)}/../builtin/sprues/#{file}"
diff --git a/lib/squib/sprues/sprue_schema.rb b/lib/squib/sprues/sprue_schema.rb
new file mode 100644
index 0000000..ddff0c7
--- /dev/null
+++ b/lib/squib/sprues/sprue_schema.rb
@@ -0,0 +1,50 @@
+module Squib
+  module Sprues
+    UNIT_REGEX = /^(\d*[.])?\d+(in|cm|mm)$/
+    ROTATE_REGEX = /^(\d*[.])?\d+(deg|rad)?$/
+    SCHEMA = {
+      'sheet_width' => UNIT_REGEX,
+      'sheet_height' => UNIT_REGEX,
+      'card_width' => UNIT_REGEX,
+      'card_height' => UNIT_REGEX,
+      'position_reference' => ClassyHash::G.enum(:topleft, :center),
+      'rotate' => [
+        :optional, Numeric,
+        ClassyHash::G.enum(:clockwise, :counterclockwise, :turnaround),
+        ROTATE_REGEX
+      ],
+      'crop_line' => {
+        'style' => [
+          ClassyHash::G.enum(:solid, :dotted, :dashed),
+          Sprues::CropLineDash::VALIDATION_REGEX
+        ],
+        'width' => UNIT_REGEX,
+        'color' => [String, Symbol],
+        'overlay' => ClassyHash::G.enum(
+          :on_margin, :overlay_on_cards, :beneath_cards
+        ),
+        'lines' => [[{
+          'type' => ClassyHash::G.enum(:horizontal, :vertical),
+          'position' => UNIT_REGEX,
+          'style' => [
+            :optional, ClassyHash::G.enum(:solid, :dotted, :dashed)
+          ],
+          'width' => [:optional, UNIT_REGEX],
+          'color' => [:optional, String, Symbol],
+          'overlay_on_cards' => [:optional, TrueClass]
+        }]]
+      },
+      'cards' => [[{
+        'x' => UNIT_REGEX,
+        'y' => UNIT_REGEX,
+        # NOTE: Don't think that we should specify rotation on a per card
+        # basis, but just included here for now
+        'rotate' => [
+          :optional, Numeric,
+          ClassyHash::G.enum(:clockwise, :counterclockwise, :turnaround),
+          ROTATE_REGEX
+        ]
+      }]]
+    }.freeze
+  end
+end
diff --git a/spec/sprue_spec.rb b/spec/sprue_spec.rb
index 377705a..065be8a 100644
--- a/spec/sprue_spec.rb
+++ b/spec/sprue_spec.rb
@@ -148,7 +148,7 @@ describe Squib::Sprue do
     expect do
       Squib::Sprue.load(sprue_file('fail_no_sheet_width.yml'), 100)
     end.to raise_error(
-      RuntimeError,
+      ClassyHash::SchemaViolationError,
       '"sheet_width" is not a String matching /^(\d*[.])?\d+(in|cm|mm)$/'
     )
   end
@@ -157,7 +157,7 @@ describe Squib::Sprue do
     expect do
       Squib::Sprue.load(sprue_file('fail_no_sheet_height.yml'), 100)
     end.to raise_error(
-      RuntimeError,
+      ClassyHash::SchemaViolationError,
       '"sheet_height" is not a String matching /^(\d*[.])?\d+(in|cm|mm)$/'
     )
   end
@@ -166,7 +166,7 @@ describe Squib::Sprue do
     expect do
       Squib::Sprue.load(sprue_file('fail_no_card_width.yml'), 100)
     end.to raise_error(
-      RuntimeError,
+      ClassyHash::SchemaViolationError,
       '"card_width" is not a String matching /^(\d*[.])?\d+(in|cm|mm)$/'
     )
   end
@@ -175,7 +175,7 @@ describe Squib::Sprue do
     expect do
       Squib::Sprue.load(sprue_file('fail_no_card_height.yml'), 100)
     end.to raise_error(
-      RuntimeError,
+      ClassyHash::SchemaViolationError,
       '"card_height" is not a String matching /^(\d*[.])?\d+(in|cm|mm)$/'
     )
   end
diff --git a/squib.gemspec b/squib.gemspec
index c29ac9c..f08b266 100644
--- a/squib.gemspec
+++ b/squib.gemspec
@@ -30,7 +30,7 @@ Gem::Specification.new do |spec|
   spec.require_paths = ['lib']
 
   spec.add_runtime_dependency 'cairo',                 '1.15.9'
-  spec.add_runtime_dependency 'classy_hash',           '0.1.5'
+  spec.add_runtime_dependency 'classy_hash',           '0.2.0'
   spec.add_runtime_dependency 'gio2',                  '3.1.8'
   spec.add_runtime_dependency 'gobject-introspection', '3.1.8'
   spec.add_runtime_dependency 'highline',              '1.7.8'