diff --git a/cocoa-foundation/Cargo.toml b/cocoa-foundation/Cargo.toml
index 523a6d14..44a4083b 100644
--- a/cocoa-foundation/Cargo.toml
+++ b/cocoa-foundation/Cargo.toml
@@ -12,11 +12,11 @@ license = "MIT / Apache-2.0"
 default-target = "x86_64-apple-darwin"
 
 [dependencies]
-block = { version = "=0.2.0-alpha.5", package = "block2" }
+block = { version = "=0.2.0-alpha.6", package = "block2" }
 bitflags = "1.0"
 libc = "0.2"
 core-foundation = { path = "../core-foundation", version = "0.9" }
 core-graphics-types = { path = "../core-graphics-types", version = "0.1" }
 foreign-types = "0.3"
-objc2 = { version = "=0.3.0-beta.1" }
-objc2-encode = { version = "=2.0.0-pre.1" }
+objc2 = { version = "=0.3.0-beta.2" }
+objc2-encode = { version = "=2.0.0-pre.2" }
diff --git a/cocoa-foundation/src/foundation.rs b/cocoa-foundation/src/foundation.rs
index ba04996b..4cd83a18 100644
--- a/cocoa-foundation/src/foundation.rs
+++ b/cocoa-foundation/src/foundation.rs
@@ -58,7 +58,7 @@ mod macos {
     }
 
     unsafe impl Encode for NSPoint {
-        const ENCODING: Encoding<'static> =
+        const ENCODING: Encoding =
             Encoding::Struct("CGPoint", &[CGFloat::ENCODING, CGFloat::ENCODING]);
     }
 
@@ -80,7 +80,7 @@ mod macos {
     }
 
     unsafe impl Encode for NSSize {
-        const ENCODING: Encoding<'static> =
+        const ENCODING: Encoding =
             Encoding::Struct("CGSize", &[CGFloat::ENCODING, CGFloat::ENCODING]);
     }
 
@@ -116,7 +116,7 @@ mod macos {
     }
 
     unsafe impl Encode for NSRect {
-        const ENCODING: Encoding<'static> =
+        const ENCODING: Encoding =
             Encoding::Struct("CGRect", &[NSPoint::ENCODING, NSSize::ENCODING]);
     }
 
@@ -161,7 +161,7 @@ pub struct NSRange {
 }
 
 unsafe impl Encode for NSRange {
-    const ENCODING: Encoding<'static> =
+    const ENCODING: Encoding =
         Encoding::Struct("_NSRange", &[NSUInteger::ENCODING, NSUInteger::ENCODING]);
 }
 
@@ -209,7 +209,7 @@ pub struct NSOperatingSystemVersion {
 }
 
 unsafe impl Encode for NSOperatingSystemVersion {
-    const ENCODING: Encoding<'static> = Encoding::Struct(
+    const ENCODING: Encoding = Encoding::Struct(
         "NSOperatingSystemVersion",
         &[
             NSUInteger::ENCODING,
@@ -681,7 +681,7 @@ struct NSFastEnumerationState {
 }
 
 unsafe impl Encode for NSFastEnumerationState {
-    const ENCODING: Encoding<'static> = Encoding::Struct(
+    const ENCODING: Encoding = Encoding::Struct(
         "?",
         &[
             libc::c_ulong::ENCODING,
@@ -693,7 +693,7 @@ unsafe impl Encode for NSFastEnumerationState {
 }
 
 unsafe impl RefEncode for NSFastEnumerationState {
-    const ENCODING_REF: Encoding<'static> = Encoding::Pointer(&Self::ENCODING);
+    const ENCODING_REF: Encoding = Encoding::Pointer(&Self::ENCODING);
 }
 
 const NS_FAST_ENUM_BUF_SIZE: usize = 16;
diff --git a/cocoa-foundation/src/lib.rs b/cocoa-foundation/src/lib.rs
index 02dc7030..a22b6269 100644
--- a/cocoa-foundation/src/lib.rs
+++ b/cocoa-foundation/src/lib.rs
@@ -26,7 +26,7 @@ pub use objc2_encode as __objc2_encode;
 macro_rules! impl_Encode {
     ($t:ty, $delegation:ty) => {
         unsafe impl $crate::__objc2_encode::Encode for $t {
-            const ENCODING: $crate::__objc2_encode::Encoding<'static> = <$delegation>::ENCODING;
+            const ENCODING: $crate::__objc2_encode::Encoding = <$delegation>::ENCODING;
         }
     }
 }
diff --git a/cocoa/Cargo.toml b/cocoa/Cargo.toml
index be246065..9510cea4 100644
--- a/cocoa/Cargo.toml
+++ b/cocoa/Cargo.toml
@@ -12,12 +12,12 @@ license = "MIT / Apache-2.0"
 default-target = "x86_64-apple-darwin"
 
 [dependencies]
-block = { version = "=0.2.0-alpha.5", package = "block2" }
+block = { version = "=0.2.0-alpha.6", package = "block2" }
 bitflags = "1.0"
 libc = "0.2"
 cocoa-foundation = { path = "../cocoa-foundation", version = "0.1" }
 core-foundation = { path = "../core-foundation", version = "0.9" }
 core-graphics = { path = "../core-graphics", version = "0.22" }
 foreign-types = "0.3"
-objc2 = { version = "=0.3.0-beta.1" }
-objc2-encode = { version = "=2.0.0-pre.1" }
+objc2 = { version = "=0.3.0-beta.2" }
+objc2-encode = { version = "=2.0.0-pre.2" }
diff --git a/cocoa/src/quartzcore.rs b/cocoa/src/quartzcore.rs
index c5ba88ce..13e669cb 100644
--- a/cocoa/src/quartzcore.rs
+++ b/cocoa/src/quartzcore.rs
@@ -1632,7 +1632,7 @@ pub mod transaction {
 
     #[inline]
     pub fn set_completion_block<F>(block: ConcreteBlock<(), (), F>)
-                                   where F: 'static + IntoConcreteBlock<(), Ret = ()> {
+                                   where F: 'static + IntoConcreteBlock<(), Output = ()> {
         unsafe {
             let block = block.copy();
             msg_send![class!(CATransaction), setCompletionBlock:&*block]
@@ -1668,7 +1668,7 @@ pub struct CATransform3D {
 }
 
 unsafe impl ::objc2_encode::Encode for CATransform3D {
-    const ENCODING: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Array(16, &CGFloat::ENCODING);
+    const ENCODING: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Array(16, &CGFloat::ENCODING);
 }
 
 impl PartialEq for CATransform3D {
@@ -1824,7 +1824,7 @@ pub struct CVTimeStamp {
 }
 
 unsafe impl ::objc2_encode::Encode for CVTimeStamp {
-    const ENCODING: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Struct(
+    const ENCODING: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Struct(
         "CVTimeStamp",
         &[
             u32::ENCODING,
@@ -1841,7 +1841,7 @@ unsafe impl ::objc2_encode::Encode for CVTimeStamp {
 }
 
 unsafe impl ::objc2_encode::RefEncode for CVTimeStamp {
-    const ENCODING_REF: ::objc2_encode::Encoding<'static> =
+    const ENCODING_REF: ::objc2_encode::Encoding =
         ::objc2_encode::Encoding::Pointer(&<Self as ::objc2_encode::Encode>::ENCODING);
 }
 
@@ -1874,7 +1874,7 @@ pub struct CVSMPTETime {
 }
 
 unsafe impl ::objc2_encode::Encode for CVSMPTETime {
-    const ENCODING: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Struct(
+    const ENCODING: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Struct(
         "CVSMPTETime",
         &[
             i16::ENCODING,
diff --git a/core-foundation-sys/Cargo.toml b/core-foundation-sys/Cargo.toml
index 816fb2cb..a11c4188 100644
--- a/core-foundation-sys/Cargo.toml
+++ b/core-foundation-sys/Cargo.toml
@@ -8,7 +8,7 @@ authors = ["The Servo Project Developers"]
 license = "MIT / Apache-2.0"
 
 [dependencies]
-objc2-encode = { version = "=2.0.0-pre.1" }
+objc2-encode = { version = "=2.0.0-pre.2" }
 
 [features]
 mac_os_10_7_support = [] # backwards compatibility
diff --git a/core-foundation-sys/src/array.rs b/core-foundation-sys/src/array.rs
index 2e0bad0f..f899432f 100644
--- a/core-foundation-sys/src/array.rs
+++ b/core-foundation-sys/src/array.rs
@@ -36,7 +36,7 @@ pub type CFArrayRef = *const __CFArray;
 pub type CFMutableArrayRef = *mut __CFArray;
 
 unsafe impl ::objc2_encode::RefEncode for __CFArray {
-    const ENCODING_REF: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Object;
+    const ENCODING_REF: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Object;
 }
 
 extern {
diff --git a/core-foundation-sys/src/attributed_string.rs b/core-foundation-sys/src/attributed_string.rs
index 5f4b984e..8101c6bc 100644
--- a/core-foundation-sys/src/attributed_string.rs
+++ b/core-foundation-sys/src/attributed_string.rs
@@ -19,7 +19,7 @@ pub type CFAttributedStringRef = *const __CFAttributedString;
 pub type CFMutableAttributedStringRef = *const __CFAttributedString;
 
 unsafe impl ::objc2_encode::RefEncode for __CFAttributedString {
-    const ENCODING_REF: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Object;
+    const ENCODING_REF: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Object;
 }
 
 extern {
diff --git a/core-foundation-sys/src/dictionary.rs b/core-foundation-sys/src/dictionary.rs
index 90df209e..d88d33e5 100644
--- a/core-foundation-sys/src/dictionary.rs
+++ b/core-foundation-sys/src/dictionary.rs
@@ -48,7 +48,7 @@ pub type CFDictionaryRef = *const __CFDictionary;
 pub type CFMutableDictionaryRef = *mut __CFDictionary;
 
 unsafe impl ::objc2_encode::RefEncode for __CFDictionary {
-    const ENCODING_REF: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Object;
+    const ENCODING_REF: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Object;
 }
 
 extern {
diff --git a/core-foundation-sys/src/string.rs b/core-foundation-sys/src/string.rs
index d141cbbc..ab1eddf3 100644
--- a/core-foundation-sys/src/string.rs
+++ b/core-foundation-sys/src/string.rs
@@ -193,7 +193,7 @@ pub struct __CFString(c_void);
 pub type CFStringRef = *const __CFString;
 
 unsafe impl ::objc2_encode::RefEncode for __CFString {
-    const ENCODING_REF: ::objc2_encode::Encoding<'static> = ::objc2_encode::Encoding::Object;
+    const ENCODING_REF: ::objc2_encode::Encoding = ::objc2_encode::Encoding::Object;
 }
 
 extern {
diff --git a/core-graphics-types/Cargo.toml b/core-graphics-types/Cargo.toml
index d4b55611..66833612 100644
--- a/core-graphics-types/Cargo.toml
+++ b/core-graphics-types/Cargo.toml
@@ -12,7 +12,7 @@ bitflags = "1.0"
 core-foundation = { path = "../core-foundation", version = "0.9" }
 foreign-types = "0.3.0"
 libc = "0.2"
-objc2-encode = { version = "=2.0.0-pre.1" }
+objc2-encode = { version = "=2.0.0-pre.2" }
 
 [package.metadata.docs.rs]
 default-target = "x86_64-apple-darwin"
diff --git a/core-graphics-types/src/geometry.rs b/core-graphics-types/src/geometry.rs
index 597deebf..8b0f7e20 100644
--- a/core-graphics-types/src/geometry.rs
+++ b/core-graphics-types/src/geometry.rs
@@ -41,7 +41,7 @@ pub struct CGSize {
 }
 
 unsafe impl Encode for CGSize {
-    const ENCODING: Encoding<'static> =
+    const ENCODING: Encoding =
         Encoding::Struct("CGSize", &[CGFloat::ENCODING, CGFloat::ENCODING]);
 }
 
@@ -70,7 +70,7 @@ pub struct CGPoint {
 }
 
 unsafe impl Encode for CGPoint {
-    const ENCODING: Encoding<'static> =
+    const ENCODING: Encoding =
         Encoding::Struct("CGPoint", &[CGFloat::ENCODING, CGFloat::ENCODING]);
 }
 
@@ -99,7 +99,7 @@ pub struct CGRect {
 }
 
 unsafe impl Encode for CGRect {
-    const ENCODING: Encoding<'static> =
+    const ENCODING: Encoding =
         Encoding::Struct("CGRect", &[CGPoint::ENCODING, CGSize::ENCODING]);
 }
 
@@ -168,7 +168,7 @@ pub struct CGAffineTransform {
 }
 
 unsafe impl Encode for CGAffineTransform {
-    const ENCODING: Encoding<'static> = Encoding::Struct(
+    const ENCODING: Encoding = Encoding::Struct(
         "CGAffineTransform",
         &[
             CGFloat::ENCODING,
diff --git a/core-graphics/Cargo.toml b/core-graphics/Cargo.toml
index 789fdc97..2de8a610 100644
--- a/core-graphics/Cargo.toml
+++ b/core-graphics/Cargo.toml
@@ -18,7 +18,7 @@ core-foundation = { path = "../core-foundation", version = "0.9" }
 core-graphics-types = { path = "../core-graphics-types", version = "0.1" }
 foreign-types = "0.3.0"
 libc = "0.2"
-objc2-encode = { version = "=2.0.0-pre.1" }
+objc2-encode = { version = "=2.0.0-pre.2" }
 
 [package.metadata.docs.rs]
 default-target = "x86_64-apple-darwin"
diff --git a/core-graphics/src/sys.rs b/core-graphics/src/sys.rs
index 223577ff..a96f3053 100644
--- a/core-graphics/src/sys.rs
+++ b/core-graphics/src/sys.rs
@@ -9,7 +9,7 @@ pub type CGImageRef = *mut CGImage;
 pub struct __CGColor(c_void);
 
 unsafe impl RefEncode for __CGColor {
-    const ENCODING_REF: Encoding<'static> = Encoding::Unknown;
+    const ENCODING_REF: Encoding = Encoding::Unknown;
 }
 
 pub type CGColorRef = *const __CGColor;
@@ -21,7 +21,7 @@ pub enum CGPath {}
 pub type CGPathRef = *mut CGPath;
 
 unsafe impl RefEncode for CGPath {
-    const ENCODING_REF: Encoding<'static> = Encoding::Unknown;
+    const ENCODING_REF: Encoding = Encoding::Unknown;
 }
 
 pub enum CGDataProvider {}
@@ -34,7 +34,7 @@ pub enum CGContext {}
 pub type CGContextRef = *mut CGContext;
 
 unsafe impl RefEncode for CGContext {
-    const ENCODING_REF: Encoding<'static> = Encoding::Unknown;
+    const ENCODING_REF: Encoding = Encoding::Unknown;
 }
 
 pub enum CGGradient {}