diff --git a/lib/prism/prism.gemspec b/lib/prism/prism.gemspec
index 08212318bc..97a9648ac7 100644
--- a/lib/prism/prism.gemspec
+++ b/lib/prism/prism.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name = "prism"
-  spec.version = "0.30.0"
+  spec.version = "1.0.0"
   spec.authors = ["Shopify"]
   spec.email = ["ruby@shopify.com"]
 
diff --git a/prism/extension.h b/prism/extension.h
index d49e4f3b9e..d7ee0b7042 100644
--- a/prism/extension.h
+++ b/prism/extension.h
@@ -1,7 +1,7 @@
 #ifndef PRISM_EXT_NODE_H
 #define PRISM_EXT_NODE_H
 
-#define EXPECTED_PRISM_VERSION "0.30.0"
+#define EXPECTED_PRISM_VERSION "1.0.0"
 
 #include <ruby.h>
 #include <ruby/encoding.h>
diff --git a/prism/templates/lib/prism/serialize.rb.erb b/prism/templates/lib/prism/serialize.rb.erb
index 7469f3683d..62108ec28a 100644
--- a/prism/templates/lib/prism/serialize.rb.erb
+++ b/prism/templates/lib/prism/serialize.rb.erb
@@ -6,11 +6,11 @@ module Prism
   module Serialize
     # The major version of prism that we are expecting to find in the serialized
     # strings.
-    MAJOR_VERSION = 0
+    MAJOR_VERSION = 1
 
     # The minor version of prism that we are expecting to find in the serialized
     # strings.
-    MINOR_VERSION = 30
+    MINOR_VERSION = 0
 
     # The patch version of prism that we are expecting to find in the serialized
     # strings.
diff --git a/prism/version.h b/prism/version.h
index d5b8a86018..3cca648996 100644
--- a/prism/version.h
+++ b/prism/version.h
@@ -9,12 +9,12 @@
 /**
  * The major version of the Prism library as an int.
  */
-#define PRISM_VERSION_MAJOR 0
+#define PRISM_VERSION_MAJOR 1
 
 /**
  * The minor version of the Prism library as an int.
  */
-#define PRISM_VERSION_MINOR 30
+#define PRISM_VERSION_MINOR 0
 
 /**
  * The patch version of the Prism library as an int.
@@ -24,6 +24,6 @@
 /**
  * The version of the Prism library as a constant string.
  */
-#define PRISM_VERSION "0.30.0"
+#define PRISM_VERSION "1.0.0"
 
 #endif