diff --git a/Cargo.lock b/Cargo.lock
index 9127eec..7c940f7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -270,7 +270,7 @@ checksum = "1306f3464951f30e30d12373d31c79fbd52d236e5e896fd92f96ec7babbbe60b"
 
 [[package]]
 name = "jexl-eval"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 dependencies = [
  "anyhow",
  "jexl-parser",
@@ -281,7 +281,7 @@ dependencies = [
 
 [[package]]
 name = "jexl-parser"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 dependencies = [
  "lalrpop-util",
  "regex",
@@ -362,7 +362,7 @@ checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
 
 [[package]]
 name = "parser-gen"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 dependencies = [
  "lalrpop",
 ]
diff --git a/jexl-eval/Cargo.toml b/jexl-eval/Cargo.toml
index 0bd5401..a4eb91d 100644
--- a/jexl-eval/Cargo.toml
+++ b/jexl-eval/Cargo.toml
@@ -1,14 +1,14 @@
 [package]
 edition = '2018'
 name = "jexl-eval"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 authors = ["Mike Cooper <mythmon@gmail.com>", "The Sync Team <sync-team@mozilla.com>", "The Glean Team <glean-team@mozilla.com>"]
 description = "A JEXL evaluator written in Rust"
 license = "MPL-2.0"
 repository = "https://github.com/mozilla/jexl-rs"
 
 [dependencies]
-jexl-parser = { version = "^0.3.0", path = "../jexl-parser" }
+jexl-parser = { version = "^0.3.1-alpha.0", path = "../jexl-parser" }
 serde_json = "1"
 serde = "1"
 thiserror = "1"
diff --git a/jexl-parser/Cargo.toml b/jexl-parser/Cargo.toml
index 8ddac98..9ef3199 100644
--- a/jexl-parser/Cargo.toml
+++ b/jexl-parser/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 edition = '2018'
 name = "jexl-parser"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 authors = ["Mike Cooper <mythmon@gmail.com>", "The Sync Team <sync-team@mozilla.com>", "The Glean Team <glean-team@mozilla.com>"]
 description = "A JEXL parser written in Rust"
 license = "MPL-2.0"
diff --git a/parser-gen/Cargo.toml b/parser-gen/Cargo.toml
index 6b85628..4e24b6f 100644
--- a/parser-gen/Cargo.toml
+++ b/parser-gen/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "parser-gen"
-version = "0.3.0"
+version = "0.3.1-alpha.0"
 authors = ["Edouard Oger <eoger@fastmail.com>"]
 edition = "2018"
 license = "MPL-2.0"