diff --git a/project.clj b/project.clj
index 1dc4a42..dec6256 100644
--- a/project.clj
+++ b/project.clj
@@ -1,4 +1,4 @@
-(defproject yesql "0.6.0"
+(defproject org.batch/yesql "0.6.2"
   :description "A Clojure library for using SQL"
   :url "https://github.com/krisajenkins/yesql"
   :license {:name "Eclipse Public License"
@@ -10,9 +10,15 @@
   :scm {:name "git"
         :url "https://github.com/krisajenkins/yesql"}
   :profiles {:dev {:dependencies [[expectations "2.1.3" :exclusions [org.clojure/clojure]]
-                                  [org.apache.derby/derby "10.11.1.1"]]
-                   :plugins [[lein-autoexpect "1.4.0"]
-                             [lein-expectations "0.0.8"]]}
+                                  [org.apache.derby/derby "10.11.1.1"]
+                                  [environ "1.1.0"]
+                                  ]
+                   :plugins [[lein-autoexpect "1.4.0" :exclusions [org.clojure/tools.namespace]]
+                             [lein-expectations "0.0.8"]
+                             [lein-environ "1.1.0"]
+                             ]
+                   :repl-options { :init-ns yesql.core}
+                   }
              :1.5 {:dependencies [[org.clojure/clojure "1.5.1"]]}
              :1.6 {:dependencies [[org.clojure/clojure "1.6.0"]]}
              :1.7 {:dependencies [[org.clojure/clojure "1.7.0"]]}
diff --git a/src/yesql/generate.clj b/src/yesql/generate.clj
index 341b30b..11136c1 100644
--- a/src/yesql/generate.clj
+++ b/src/yesql/generate.clj
@@ -5,7 +5,8 @@
             [yesql.util :refer [create-root-var]]
             [yesql.types :refer [map->Query]]
             [yesql.statement-parser :refer [tokenize insert-table-name-regex]])
-  (:import [yesql.types Query]))
+  (:import [yesql.types Query])
+  (import java.lang.IllegalArgumentException))
 
 (def in-list-parameter?
   "Check if a type triggers IN-list expansion."
@@ -39,17 +40,17 @@
                       (-> (keys initial-args) set (disj :?)))
         actual-positional-count (count (:? initial-args))
         missing-keys (set/difference expected-keys actual-keys)]
-    (assert (empty? missing-keys)
-            (format "Query argument mismatch.\nExpected keys: %s\nActual keys: %s\nMissing keys: %s"
+    (if-not (empty? missing-keys)
+            (throw (IllegalArgumentException. (format "Query argument mismatch.\nExpected keys: %s\nActual keys: %s\nMissing keys: %s"
                     (str (seq expected-keys))
                     (str (seq actual-keys))
-                    (str (seq missing-keys))))
-    (assert (= expected-positional-count actual-positional-count)
-            (format (join "\n"
+                    (str (seq missing-keys))))))
+    (if-not (= expected-positional-count actual-positional-count)
+            (throw (IllegalArgumentException. (format (join "\n"
                           ["Query argument mismatch."
                            "Expected %d positional parameters. Got %d."
                            "Supply positional parameters as {:? [...]}"])
-                    expected-positional-count actual-positional-count))))
+                    expected-positional-count actual-positional-count))))))
 
 (defn rewrite-query-for-jdbc
   [tokens initial-args]