diff --git a/CHANGELOG.md b/CHANGELOG.md
index 70fcead8d9..3f10fc259d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 ## [Unreleased]
 
+## [1.5.1] - 2025-09-13
+
+### Changed
+
+- Revert of a bug introduced with static literal flags on interpolated strings.
+
 ## [1.5.0] - 2025-09-12
 
 ### Added
@@ -670,7 +676,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/) a
 
 - 🎉 Initial release! 🎉
 
-[unreleased]: https://github.com/ruby/prism/compare/v1.5.0...HEAD
+[unreleased]: https://github.com/ruby/prism/compare/v1.5.1...HEAD
+[1.5.1]: https://github.com/ruby/prism/compare/v1.5.0...v1.5.1
 [1.5.0]: https://github.com/ruby/prism/compare/v1.4.0...v1.5.0
 [1.4.0]: https://github.com/ruby/prism/compare/v1.3.0...v1.4.0
 [1.3.0]: https://github.com/ruby/prism/compare/v1.2.0...v1.3.0
diff --git a/Gemfile.lock b/Gemfile.lock
index 4279f2928b..19d0fb4a86 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/ext/prism/extension.h b/ext/prism/extension.h
index f4cb9c438d..b18e770d92 100644
--- a/ext/prism/extension.h
+++ b/ext/prism/extension.h
@@ -1,7 +1,7 @@
 #ifndef PRISM_EXT_NODE_H
 #define PRISM_EXT_NODE_H
 
-#define EXPECTED_PRISM_VERSION "1.5.0"
+#define EXPECTED_PRISM_VERSION "1.5.1"
 
 #include <ruby.h>
 #include <ruby/encoding.h>
diff --git a/gemfiles/2.7/Gemfile.lock b/gemfiles/2.7/Gemfile.lock
index dbca77fc1d..738f47cc9c 100644
--- a/gemfiles/2.7/Gemfile.lock
+++ b/gemfiles/2.7/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.0/Gemfile.lock b/gemfiles/3.0/Gemfile.lock
index 81e70a2ded..aa25f46c8b 100644
--- a/gemfiles/3.0/Gemfile.lock
+++ b/gemfiles/3.0/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.1/Gemfile.lock b/gemfiles/3.1/Gemfile.lock
index 138eef976e..bf71c63817 100644
--- a/gemfiles/3.1/Gemfile.lock
+++ b/gemfiles/3.1/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.2/Gemfile.lock b/gemfiles/3.2/Gemfile.lock
index 9fb6602c60..ed775841a9 100644
--- a/gemfiles/3.2/Gemfile.lock
+++ b/gemfiles/3.2/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.3/Gemfile.lock b/gemfiles/3.3/Gemfile.lock
index 5e04141827..b076083b8f 100644
--- a/gemfiles/3.3/Gemfile.lock
+++ b/gemfiles/3.3/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.4/Gemfile.lock b/gemfiles/3.4/Gemfile.lock
index 4092a91ae1..12fdf3a16e 100644
--- a/gemfiles/3.4/Gemfile.lock
+++ b/gemfiles/3.4/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/3.5/Gemfile.lock b/gemfiles/3.5/Gemfile.lock
index 88f55dad89..0d57895538 100644
--- a/gemfiles/3.5/Gemfile.lock
+++ b/gemfiles/3.5/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/jruby/Gemfile.lock b/gemfiles/jruby/Gemfile.lock
index 8015a5ab54..9835176bab 100644
--- a/gemfiles/jruby/Gemfile.lock
+++ b/gemfiles/jruby/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/gemfiles/truffleruby/Gemfile.lock b/gemfiles/truffleruby/Gemfile.lock
index de5b39c52d..d43fab69db 100644
--- a/gemfiles/truffleruby/Gemfile.lock
+++ b/gemfiles/truffleruby/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: ../..
   specs:
-    prism (1.5.0)
+    prism (1.5.1)
 
 GEM
   remote: https://rubygems.org/
diff --git a/include/prism/version.h b/include/prism/version.h
index 697c7b5ad6..697ba0647d 100644
--- a/include/prism/version.h
+++ b/include/prism/version.h
@@ -19,11 +19,11 @@
 /**
  * The patch version of the Prism library as an int.
  */
-#define PRISM_VERSION_PATCH 0
+#define PRISM_VERSION_PATCH 1
 
 /**
  * The version of the Prism library as a constant string.
  */
-#define PRISM_VERSION "1.5.0"
+#define PRISM_VERSION "1.5.1"
 
 #endif
diff --git a/javascript/package.json b/javascript/package.json
index 5db7c6f312..be505af226 100644
--- a/javascript/package.json
+++ b/javascript/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@ruby/prism",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "description": "Prism Ruby parser",
   "type": "module",
   "main": "src/index.js",
diff --git a/prism.gemspec b/prism.gemspec
index 74b9971a00..65305d0ec1 100644
--- a/prism.gemspec
+++ b/prism.gemspec
@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name = "prism"
-  spec.version = "1.5.0"
+  spec.version = "1.5.1"
   spec.authors = ["Shopify"]
   spec.email = ["ruby@shopify.com"]
 
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 91caea4e74..35f580e271 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -224,7 +224,7 @@ checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
 
 [[package]]
 name = "ruby-prism"
-version = "1.5.0"
+version = "1.5.1"
 dependencies = [
  "ruby-prism-sys",
  "serde",
@@ -233,7 +233,7 @@ dependencies = [
 
 [[package]]
 name = "ruby-prism-sys"
-version = "1.5.0"
+version = "1.5.1"
 dependencies = [
  "bindgen",
  "cc",
diff --git a/rust/ruby-prism-sys/Cargo.toml b/rust/ruby-prism-sys/Cargo.toml
index 371e6613ad..b33261c657 100644
--- a/rust/ruby-prism-sys/Cargo.toml
+++ b/rust/ruby-prism-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruby-prism-sys"
-version = "1.5.0"
+version = "1.5.1"
 edition = "2021"
 license-file = "../../LICENSE.md"
 repository = "https://github.com/ruby/prism"
diff --git a/rust/ruby-prism-sys/tests/utils_tests.rs b/rust/ruby-prism-sys/tests/utils_tests.rs
index f25e4cbae5..06ca4f6247 100644
--- a/rust/ruby-prism-sys/tests/utils_tests.rs
+++ b/rust/ruby-prism-sys/tests/utils_tests.rs
@@ -12,7 +12,7 @@ fn version_test() {
         CStr::from_ptr(version)
     };
 
-    assert_eq!(&cstring.to_string_lossy(), "1.5.0");
+    assert_eq!(&cstring.to_string_lossy(), "1.5.1");
 }
 
 #[test]
diff --git a/rust/ruby-prism/Cargo.toml b/rust/ruby-prism/Cargo.toml
index 3c20917f4a..9a5a84ece1 100644
--- a/rust/ruby-prism/Cargo.toml
+++ b/rust/ruby-prism/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "ruby-prism"
-version = "1.5.0"
+version = "1.5.1"
 edition = "2021"
 license-file = "../../LICENSE.md"
 repository = "https://github.com/ruby/prism"
@@ -26,7 +26,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_yaml = "0.9"
 
 [dependencies]
-ruby-prism-sys = { version = "1.5.0", path = "../ruby-prism-sys" }
+ruby-prism-sys = { version = "1.5.1", path = "../ruby-prism-sys" }
 
 [features]
 default = ["vendored"]
diff --git a/templates/java/org/prism/Loader.java.erb b/templates/java/org/prism/Loader.java.erb
index 3109feba18..0a069e784a 100644
--- a/templates/java/org/prism/Loader.java.erb
+++ b/templates/java/org/prism/Loader.java.erb
@@ -102,7 +102,7 @@ public class Loader {
 
         expect((byte) 1, "prism major version does not match");
         expect((byte) 5, "prism minor version does not match");
-        expect((byte) 0, "prism patch version does not match");
+        expect((byte) 1, "prism patch version does not match");
 
         expect((byte) 1, "Loader.java requires no location fields in the serialized output");
 
diff --git a/templates/javascript/src/deserialize.js.erb b/templates/javascript/src/deserialize.js.erb
index 1559dfa2e3..1f8b613a4f 100644
--- a/templates/javascript/src/deserialize.js.erb
+++ b/templates/javascript/src/deserialize.js.erb
@@ -2,7 +2,7 @@ import * as nodes from "./nodes.js";
 
 const MAJOR_VERSION = 1;
 const MINOR_VERSION = 5;
-const PATCH_VERSION = 0;
+const PATCH_VERSION = 1;
 
 // The DataView getFloat64 function takes an optional second argument that
 // specifies whether the number is little-endian or big-endian. It does not
diff --git a/templates/lib/prism/serialize.rb.erb b/templates/lib/prism/serialize.rb.erb
index a5909e15bb..366878f709 100644
--- a/templates/lib/prism/serialize.rb.erb
+++ b/templates/lib/prism/serialize.rb.erb
@@ -14,7 +14,7 @@ module Prism
 
     # The patch version of prism that we are expecting to find in the serialized
     # strings.
-    PATCH_VERSION = 0
+    PATCH_VERSION = 1
 
     # Deserialize the dumped output from a request to parse or parse_file.
     #