diff --git a/.gitignore b/.gitignore
index e38470e..27e0a4a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,7 +11,11 @@
 xcuserdata
 profile
 *.moved-aside
-
+DerivedData
+.idea/
+*.hmap
+*.xcuserstate
+*.xccheckout
 
 # old school
 .svn
diff --git a/OHAttributedLabel/OHAttributedLabel.xcodeproj/project.pbxproj b/OHAttributedLabel/OHAttributedLabel.xcodeproj/project.pbxproj
index 9a33645..463fa7a 100644
--- a/OHAttributedLabel/OHAttributedLabel.xcodeproj/project.pbxproj
+++ b/OHAttributedLabel/OHAttributedLabel.xcodeproj/project.pbxproj
@@ -292,6 +292,7 @@
 		09E159F7160F573A003025B4 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ARCHS = "$(ARCHS_STANDARD_INCLUDING_64_BIT)";
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
@@ -314,6 +315,7 @@
 		09E159F8160F573A003025B4 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				ARCHS = "$(ARCHS_STANDARD_INCLUDING_64_BIT)";
 				CLANG_ENABLE_OBJC_ARC = YES;
 				CLANG_WARN_CONSTANT_CONVERSION = YES;
 				CLANG_WARN_ENUM_CONVERSION = YES;
diff --git a/OHAttributedLabel/Source/NSAttributedString+Attributes.m b/OHAttributedLabel/Source/NSAttributedString+Attributes.m
index e64f962..598fc04 100644
--- a/OHAttributedLabel/Source/NSAttributedString+Attributes.m
+++ b/OHAttributedLabel/Source/NSAttributedString+Attributes.m
@@ -27,6 +27,8 @@
 
 #import "NSAttributedString+Attributes.h"
 
+#include <tgmath.h>
+
 #if ! defined(COCOAPODS) && ! defined(OHATTRIBUTEDLABEL_DEDICATED_PROJECT)
 // Copying files in your project and thus compiling OHAttributedLabel under different build settings
 // than the one provided is not recommended and increase risks of leaks (mixing ARC vs. MRC) or unwanted behaviors
@@ -71,7 +73,7 @@ -(CGSize)sizeConstrainedToSize:(CGSize)maxSize fitRange:(NSRange*)fitRange
     {
         CFRange fitCFRange = CFRangeMake(0,0);
         sz = CTFramesetterSuggestFrameSizeWithConstraints(framesetter,CFRangeMake(0,0),NULL,maxSize,&fitCFRange);
-        sz = CGSizeMake( floorf(sz.width+1) , floorf(sz.height+1) ); // take 1pt of margin for security
+        sz = CGSizeMake( floor(sz.width+1) , floor(sz.height+1) ); // take 1pt of margin for security
         CFRelease(framesetter);
 
         if (fitRange)
@@ -348,7 +350,9 @@ -(void)setCharacterSpacing:(CGFloat)chracterSpacing
 }
 -(void)setCharacterSpacing:(CGFloat)chracterSpacing range:(NSRange)range
 {
-    [self addAttribute:(NSString *)kCTKernAttributeName value:[NSNumber numberWithFloat:chracterSpacing] range:range];
+    [self addAttribute:(NSString *)kCTKernAttributeName
+                 value:@(chracterSpacing) // http://stackoverflow.com/a/17067994
+                 range:range];
 }
 
 -(void)modifyParagraphStylesWithBlock:(void(^)(OHParagraphStyle* paragraphStyle))block
diff --git a/OHAttributedLabel/Source/OHAttributedLabel.m b/OHAttributedLabel/Source/OHAttributedLabel.m
index 7053881..5c1f8b7 100755
--- a/OHAttributedLabel/Source/OHAttributedLabel.m
+++ b/OHAttributedLabel/Source/OHAttributedLabel.m
@@ -29,6 +29,8 @@
 #import "CoreTextUtils.h"
 #import "OHTouchesGestureRecognizer.h"
 
+#include <tgmath.h>
+
 #ifndef OHATTRIBUTEDLABEL_WARN_ABOUT_KNOWN_ISSUES
 #define OHATTRIBUTEDLABEL_WARN_ABOUT_KNOWN_ISSUES 1
 #endif
@@ -556,7 +558,7 @@ - (void)drawTextInRect:(CGRect)aRect
                     CGSize sz = CTFramesetterSuggestFrameSizeWithConstraints(framesetter,CFRangeMake(0,0),NULL,CGSizeMake(drawingRect.size.width,CGFLOAT_MAX),NULL);
                     if (self.extendBottomToFit)
                     {
-                        CGFloat delta = MAX(0.f , ceilf(sz.height - drawingRect.size.height)) + 10 /* Security margin */;
+                        CGFloat delta = MAX(0.f , ceil(sz.height - drawingRect.size.height)) + 10 /* Security margin */;
                         drawingRect.origin.y -= delta;
                         drawingRect.size.height += delta;
                     }
diff --git a/OHAttributedLabel/Source/OHTouchesGestureRecognizer.m b/OHAttributedLabel/Source/OHTouchesGestureRecognizer.m
index eb832a1..c6c328a 100644
--- a/OHAttributedLabel/Source/OHTouchesGestureRecognizer.m
+++ b/OHAttributedLabel/Source/OHTouchesGestureRecognizer.m
@@ -29,6 +29,8 @@
 
 #import <UIKit/UIGestureRecognizerSubclass.h>
 
+#include <tgmath.h>
+
 @interface OHTouchesGestureRecognizer ()
 
 @property (nonatomic, assign) CGPoint startPoint;
@@ -49,7 +51,7 @@ - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
     CGPoint currentPoint = [touch locationInView:self.view];
     CGFloat distanceX = (currentPoint.x - _startPoint.x);
     CGFloat distanceY = (currentPoint.y - _startPoint.y);
-    CGFloat distance = sqrtf(distanceX * distanceX + distanceY * distanceY);
+    CGFloat distance = sqrt(distanceX * distanceX + distanceY * distanceY);
     if (distance > 10.0f) {
         self.state = UIGestureRecognizerStateCancelled;
     } else {