diff --git a/CHANGELOG.md b/CHANGELOG.md
index 97cf0fa5..d4316ecd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,8 +1,10 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
-### Unreleased
-- Fix bug when printing buffer to self in some cases.
+### 1.5.1 - 2019-11-16
+- Fix bug when printing buffer to self in some edge cases.
+- Fix bug with `jpm` on windows.
+- Fix `update` return value.
 
 ## 1.5.0 - 2019-11-10
 - `os/date` now defaults to UTC.
diff --git a/appveyor.yml b/appveyor.yml
index 2c2432ac..1fab060a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -30,7 +30,7 @@ install:
     - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" %platform%
     - build_win test-install
     - set janet_outname=%appveyor_repo_tag_name%
-    - if "%janet_outname%"=="" set janet_outname=v1.5.0
+    - if "%janet_outname%"=="" set janet_outname=v1.5.1
 build: off
 
 artifacts:
diff --git a/janet-installer.nsi b/janet-installer.nsi
index 5d5452eb..45279727 100644
--- a/janet-installer.nsi
+++ b/janet-installer.nsi
@@ -1,5 +1,5 @@
 # Version
-!define VERSION "1.5.0"
+!define VERSION "1.5.1"
 !define PRODUCT_VERSION "${VERSION}.0"
 VIProductVersion "${PRODUCT_VERSION}"
 VIFileVersion "${PRODUCT_VERSION}"
diff --git a/meson.build b/meson.build
index a76051a9..9e482cab 100644
--- a/meson.build
+++ b/meson.build
@@ -20,7 +20,7 @@
 
 project('janet', 'c',
   default_options : ['c_std=c99', 'b_lundef=false', 'default_library=both'],
-  version : '1.5.0')
+  version : '1.5.1')
 
 # Global settings
 janet_path = join_paths(get_option('prefix'), get_option('libdir'), 'janet')
diff --git a/src/boot/boot.janet b/src/boot/boot.janet
index 6e62bea2..fb4fd83c 100644
--- a/src/boot/boot.janet
+++ b/src/boot/boot.janet
@@ -966,13 +966,13 @@
 (defn zipcoll
   "Creates a table from two arrays/tuples.
   Returns a new table."
-  [keys vals]
+  [ks vs]
   (def res @{})
-  (def lk (length keys))
-  (def lv (length vals))
+  (def lk (length ks))
+  (def lv (length vs))
   (def len (if (< lk lv) lk lv))
   (for i 0 len
-    (put res (in keys i) (in vals i)))
+    (put res (in ks i) (in vs i)))
   res)
 
 (defn get-in
@@ -981,7 +981,7 @@
   [ds ks &opt dflt]
   (var d ds)
   (loop [k :in ks :while d] (set d (get d k)))
-  (or d dflt))
+  (if (= nil d) dflt d))
 
 (defn update-in
   "Update a value in a nested data structure by applying f to the current value.
diff --git a/src/conf/janetconf.h b/src/conf/janetconf.h
index 09879171..a5908ece 100644
--- a/src/conf/janetconf.h
+++ b/src/conf/janetconf.h
@@ -28,9 +28,9 @@
 
 #define JANET_VERSION_MAJOR 1
 #define JANET_VERSION_MINOR 5
-#define JANET_VERSION_PATCH 0
+#define JANET_VERSION_PATCH 1
 #define JANET_VERSION_EXTRA ""
-#define JANET_VERSION "1.5.0"
+#define JANET_VERSION "1.5.1"
 
 /* #define JANET_BUILD "local" */