diff --git a/.gitignore b/.gitignore
index 7fecd0f..80af1cf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,4 @@ asymptote-2.03.src.tgz
 /asymptote-2.47.src.tgz
 /asymptote-2.48.src.tgz
 /asymptote-2.52.src.tgz
+/asymptote-2.55.src.tgz
diff --git a/asymptote-2.55-settings.patch b/asymptote-2.55-settings.patch
new file mode 100644
index 0000000..876cab8
--- /dev/null
+++ b/asymptote-2.55-settings.patch
@@ -0,0 +1,16 @@
+diff -up asymptote-2.55/settings.cc.settings asymptote-2.55/settings.cc
+--- asymptote-2.55/settings.cc.settings	2019-09-30 06:47:32.464160386 -0400
++++ asymptote-2.55/settings.cc	2019-09-30 06:48:48.419518013 -0400
+@@ -98,9 +98,9 @@ string defaultPSViewer="open";
+ string defaultPDFViewer="open";
+ string defaultHTMLViewer="open";
+ #else  
+-string defaultPSViewer="gv";
+-string defaultPDFViewer="acroread";
+-string defaultHTMLViewer="google-chrome";
++string defaultPSViewer="evince";
++string defaultPDFViewer="evince";
++string defaultHTMLViewer="chromium";
+ #endif  
+ string defaultGhostscript="gs";
+ string defaultGhostscriptLibrary="";
diff --git a/asymptote.spec b/asymptote.spec
index 043533d..284de21 100644
--- a/asymptote.spec
+++ b/asymptote.spec
@@ -1,8 +1,10 @@
 %{!?_texmf: %global _texmf %(eval "echo `kpsewhich -expand-var '$TEXMFMAIN'`")}
 
+%global optflags %{optflags} -DGLM_ENABLE_EXPERIMENTAL
+
 Name:           asymptote
-Version:        2.52
-Release:        2%{?dist}
+Version:        2.55
+Release:        1%{?dist}
 Summary:        Descriptive vector graphics language
 License:        LGPLv3+
 URL:            http://asymptote.sourceforge.net/
@@ -10,7 +12,7 @@ Source0:        http://download.sourceforge.net/sourceforge/asymptote/asymptote-
 Source1:        asy.gif
 Source2:        xasy.desktop
 Source3:        asymptote.sty.204
-Patch0:         asymptote-2.52-settings.patch
+Patch0:         asymptote-2.55-settings.patch
 # This doesn't need to go upstream. We put the info file in the topdir, not a subdir, so we need this fix.
 Patch3:         asymptote-2.08-info-path-fix.patch
 # Use libtirpc if found
@@ -62,6 +64,9 @@ Requires:       python3-qt5
 Requires:       python3-cson, python3-speg
 Requires:       python3-tkinter
 Requires:       python3-imaging-tk
+Requires:       python3-numpy
+Recommends:     evince, chromium
+
 # for /usr/bin/texhash
 Requires(post): texlive-kpathsea-bin, tex-kpathsea
 Requires(postun): texlive-kpathsea-bin, tex-kpathsea
@@ -177,6 +182,11 @@ texhash >/dev/null 2>&1 || :
 %{_xemacs_sitelispdir}/%{name}/*.el
 
 %changelog
+* Mon Sep 30 2019 Tom Callaway <spot@fedoraproject.org> - 2.55-1
+- update to 2.55
+- fix missing numpy dependendency
+- add recommends for tools configured in settings
+
 * Tue Aug 20 2019 Susi Lehtola <jussilehtola@fedoraproject.org> - 2.52-2
 - Rebuilt for GSL 2.6.
 
diff --git a/sources b/sources
index 79cf573..6d530cc 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (asymptote-2.52.src.tgz) = b6f51ec91ee4fd3a2307650b1445380a883b604cbe3b3ea885887f15e923c391c2185c411ef759564aa538017958d692159a462e6b0eb134850de1e67413ec57
+SHA512 (asymptote-2.55.src.tgz) = ff058974c157ed8e13a22f98122b89c7f559f5fa2bb09fd5d719c97b06bc819b79e87c287d10eb6a97c7cb9257c668c42c29d29582056ed01ba21f99bd35e289