diff --git a/base/pdata.sty b/base/pdata.sty
index 5cd50ce..a68ce9e 100644
--- a/base/pdata.sty
+++ b/base/pdata.sty
@@ -118,6 +118,19 @@
 \newcommand\WAref[1]{\pdataRef{wa}{#1}{label}}
 \newcommand\WAtref[1]{\WAref{#1}: \pdataRefFB{wa}{#1}{short}{title}}
 \fi
+\renewbibmacro*{event+venue+date}{}
+\renewbibmacro*{doi+eprint+url}{%
+  \iftoggle{bbx:doi}
+    {\printfield{doi}\iffieldundef{doi}{}{\clearfield{url}}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:eprint}
+    {\usebibmacro{eprint}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:url}
+    {\usebibmacro{url+urldate}}
+    {}}
 \newcommand{\signatures}[1]{\section{#1}
 \qquad\number\day. \number\month. \number\year\\[6ex]
 \strut\qquad Date\hfill\@for\@p:=\prop@gen@PIs\do{%
diff --git a/base/proposal.cls b/base/proposal.cls
index 6cd1c88..00b46b7 100644
--- a/base/proposal.cls
+++ b/base/proposal.cls
@@ -34,6 +34,19 @@
 \ProcessOptions
 \LoadClass[a4paper,twoside]{\proposal@class}
 \RequirePackage{proposal}
+\renewbibmacro*{event+venue+date}{}
+\renewbibmacro*{doi+eprint+url}{%
+  \iftoggle{bbx:doi}
+    {\printfield{doi}\iffieldundef{doi}{}{\clearfield{url}}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:eprint}
+    {\usebibmacro{eprint}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:url}
+    {\usebibmacro{url+urldate}}
+    {}}
 \endinput
 %%
 %% End of file `proposal.cls'.
diff --git a/base/proposal.dtx b/base/proposal.dtx
index 7a39753..f8183f6 100644
--- a/base/proposal.dtx
+++ b/base/proposal.dtx
@@ -2512,6 +2512,23 @@ joint&\multicolumn{\the@site}{l|}{\jpub $\hat=$ publication, \jpro $\hat=$ proje
  \@for\@I:=\prop@gen@pubspages\do{\par\noindent\csname\@I\endcsname}}}
 %</sty>
 %    \end{macrocode}
+% 
+% Finally, we tweak {bib\LaTeX} to not give DOIs and URLS at the same time. 
+%   \begin{macrocode}
+\renewbibmacro*{event+venue+date}{}
+\renewbibmacro*{doi+eprint+url}{%
+  \iftoggle{bbx:doi}
+    {\printfield{doi}\iffieldundef{doi}{}{\clearfield{url}}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:eprint}
+    {\usebibmacro{eprint}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:url}
+    {\usebibmacro{url+urldate}}
+    {}}
+%    \end{macrocode}
 %
 % \subsection{Miscellaneous}\label{sec:impl:misc}
 % 
diff --git a/base/proposal.pdf b/base/proposal.pdf
index a423dd9..c53f341 100644
Binary files a/base/proposal.pdf and b/base/proposal.pdf differ
diff --git a/base/proposal.sty b/base/proposal.sty
index 5c0b50d..938afa9 100644
--- a/base/proposal.sty
+++ b/base/proposal.sty
@@ -1000,6 +1000,19 @@ joint&\multicolumn{\the@site}{l|}{\jpub $\hat=$ publication, \jpro $\hat=$ proje
                    use the pubspage key in the proposal environment!}}
   {\prop@warnpubs@message%
  \@for\@I:=\prop@gen@pubspages\do{\par\noindent\csname\@I\endcsname}}}
+\renewbibmacro*{event+venue+date}{}
+\renewbibmacro*{doi+eprint+url}{%
+  \iftoggle{bbx:doi}
+    {\printfield{doi}\iffieldundef{doi}{}{\clearfield{url}}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:eprint}
+    {\usebibmacro{eprint}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:url}
+    {\usebibmacro{url+urldate}}
+    {}}
 \endinput
 %%
 %% End of file `proposal.sty'.
diff --git a/base/reporting.cls b/base/reporting.cls
index d97fc36..da024cb 100644
--- a/base/reporting.cls
+++ b/base/reporting.cls
@@ -60,6 +60,19 @@
 \end{center}
 \setcounter{tocdepth}{2}\tableofcontents\newpage\setcounter{page}{1}}
 {}
+\renewbibmacro*{event+venue+date}{}
+\renewbibmacro*{doi+eprint+url}{%
+  \iftoggle{bbx:doi}
+    {\printfield{doi}\iffieldundef{doi}{}{\clearfield{url}}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:eprint}
+    {\usebibmacro{eprint}}
+    {}%
+  \newunit\newblock
+  \iftoggle{bbx:url}
+    {\usebibmacro{url+urldate}}
+    {}}
 \endinput
 %%
 %% End of file `reporting.cls'.