diff --git a/Basic/Makefile.PL b/Basic/Makefile.PL
index c46c064..6f368ec 100644
--- a/Basic/Makefile.PL
+++ b/Basic/Makefile.PL
@@ -5,7 +5,7 @@ if (defined(&PDL::indx)) {
 }
 
 eval q{
-        $package = ["stats_basic.pp",Basic,PDL::Stats::Basic];
+        $package = ["stats_basic.pd",Basic,PDL::Stats::Basic];
         %hash = pdlpp_stdargs($package);
 
         WriteMakefile( %hash );
diff --git a/Basic/stats_basic.pp b/Basic/stats_basic.pd
similarity index 100%
rename from Basic/stats_basic.pp
rename to Basic/stats_basic.pd
diff --git a/Distr/Makefile.PL b/Distr/Makefile.PL
index f17390f..f0564dc 100644
--- a/Distr/Makefile.PL
+++ b/Distr/Makefile.PL
@@ -2,7 +2,7 @@ use PDL::Core::Dev;
 use ExtUtils::MakeMaker;
 PDL::Core::Dev->import();
 
-$package = ["distr.pp",Distr,PDL::Stats::Distr];
+$package = ["distr.pd",Distr,PDL::Stats::Distr];
 %hash = pdlpp_stdargs($package);
 
 chomp( my $libgsl = `gsl-config --libs` );
diff --git a/Distr/distr.pp b/Distr/distr.pd
similarity index 100%
rename from Distr/distr.pp
rename to Distr/distr.pd
diff --git a/GLM/Makefile.PL b/GLM/Makefile.PL
index 6efb1f7..4bf0b7f 100644
--- a/GLM/Makefile.PL
+++ b/GLM/Makefile.PL
@@ -9,7 +9,7 @@ if ($PDL::VERSION =~ /^2\.4\.7/) {
     exit;
 }
 
-$package = ["glm.pp",GLM,PDL::Stats::GLM];
+$package = ["glm.pd",GLM,PDL::Stats::GLM];
 %hash = pdlpp_stdargs($package); 
 
 WriteMakefile( %hash );
diff --git a/GLM/glm.pp b/GLM/glm.pd
similarity index 100%
rename from GLM/glm.pp
rename to GLM/glm.pd
diff --git a/Kmeans/Makefile.PL b/Kmeans/Makefile.PL
index 1befe9b..84703a6 100644
--- a/Kmeans/Makefile.PL
+++ b/Kmeans/Makefile.PL
@@ -2,7 +2,7 @@
    use ExtUtils::MakeMaker;
    PDL::Core::Dev->import();
    
-   $package = ["kmeans.pp",Kmeans,PDL::Stats::Kmeans];
+   $package = ["kmeans.pd",Kmeans,PDL::Stats::Kmeans];
    %hash = pdlpp_stdargs($package);
    
    WriteMakefile( %hash );
diff --git a/Kmeans/kmeans.pp b/Kmeans/kmeans.pd
similarity index 100%
rename from Kmeans/kmeans.pp
rename to Kmeans/kmeans.pd
diff --git a/MANIFEST b/MANIFEST
index a95fb67..7b9498c 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -4,17 +4,17 @@ Makefile.PL
 add_doc.pl
 README.md
 Stats.pm
-Basic/stats_basic.pp
+Basic/stats_basic.pd
 Basic/Makefile.PL
-Distr/distr.pp
+Distr/distr.pd
 Distr/Makefile.PL
 Distr/t/stats_distr.t
-GLM/glm.pp
+GLM/glm.pd
 GLM/Makefile.PL
 GSL/gsl_cdf.pd
 GSL/Makefile.PL
 GSL/t/cdf.t
-Kmeans/kmeans.pp
+Kmeans/kmeans.pd
 Kmeans/Makefile.PL
 t/01-checkmanifest.t
 t/stats_basic.t
@@ -22,6 +22,6 @@ t/stats_glm.t
 t/stats_ols_rptd.t
 t/stats_kmeans.t
 t/stats_ts.t
-TS/ts.pp
+TS/ts.pd
 TS/Makefile.PL
 xt/00-check-changelog.t
diff --git a/TS/Makefile.PL b/TS/Makefile.PL
index ac5337b..e2fc860 100644
--- a/TS/Makefile.PL
+++ b/TS/Makefile.PL
@@ -2,7 +2,7 @@
    use ExtUtils::MakeMaker;
    PDL::Core::Dev->import();
    
-   $package = ["ts.pp",TS,PDL::Stats::TS];
+   $package = ["ts.pd",TS,PDL::Stats::TS];
    %hash = pdlpp_stdargs($package);
 
    WriteMakefile( %hash );
diff --git a/TS/ts.pp b/TS/ts.pd
similarity index 100%
rename from TS/ts.pp
rename to TS/ts.pd