diff --git a/lib/Module/Metadata.pm b/lib/Module/Metadata.pm
index ae06d46..bedf968 100644
--- a/lib/Module/Metadata.pm
+++ b/lib/Module/Metadata.pm
@@ -87,7 +87,7 @@ my $CLASS_REGEXP = qr{  # match a class declaration (core since 5.38)
   \s*                   # optional whitespace
   ($V_NUM_REGEXP)?      # optional version number
   \s*                   # optional whitespace
-  [;\{]                 # semicolon line terminator or block start
+  [:;\{]                # attribute start, semicolon line terminator or block start
 }x;
 
 my $VARNAME_REGEXP = qr{ # match fully-qualified VERSION name
diff --git a/t/extract-version.t b/t/extract-version.t
index 29cfbec..717d21b 100644
--- a/t/extract-version.t
+++ b/t/extract-version.t
@@ -386,6 +386,38 @@ our $VERSION = '1.23_00_00';
   vers => 'v1.2_3',
   all_versions => { Simple => 'v1.2_3' },
 },
+{
+  name => 'class NAME VERSION ATTRIBUTE',
+  code => <<'---',
+  class Simple 1.23 :isa(Complex);
+---
+  vers => '1.23',
+  all_versions => { Simple => '1.23' },
+},
+{
+  name => 'class NAME VERSION ATTRIBUTE',
+  code => <<'---',
+  class Simple 1.23_01 :isa(Complex);
+---
+  vers => '1.23_01',
+  all_versions => { Simple => '1.23_01' },
+},
+{
+  name => 'class NAME VERSION ATTRIBUTE',
+  code => <<'---',
+  class Simple v1.2.3 :isa(Complex);
+---
+  vers => 'v1.2.3',
+  all_versions => { Simple => 'v1.2.3' },
+},
+{
+  name => 'class NAME VERSION ATTRIBUTE',
+  code => <<'---',
+  class Simple v1.2_3 :isa(Complex);
+---
+  vers => 'v1.2_3',
+  all_versions => { Simple => 'v1.2_3' },
+},
 {
   name => 'trailing crud',
   code => <<'---',
@@ -506,6 +538,46 @@ class Simple v1.2.3_4 {
   vers => 'v1.2.3_4',
   all_versions => { Simple => 'v1.2.3_4' },
 },
+{
+  name => 'class NAME ATTRIBUTE BLOCK, undef $VERSION',
+  code => <<'---',
+class Simple :isa(Complex) {
+  our $VERSION;
+}
+---
+  vers => $undef,
+  all_versions => {},
+},
+{
+  name => 'class NAME ATTRIBUTE BLOCK, with $VERSION',
+  code => <<'---',
+class Simple :isa(Complex) {
+  our $VERSION = '1.23';
+}
+---
+  vers => '1.23',
+  all_versions => { Simple => '1.23' },
+},
+{
+  name => 'class NAME VERSION ATTRIBUTE BLOCK (1)',
+  code => <<'---',
+class Simple 1.23 :isa(Complex) {
+  1;
+}
+---
+  vers => '1.23',
+  all_versions => { Simple => '1.23' },
+},
+{
+  name => 'class NAME VERSION ATTRIBUTE BLOCK (2)',
+  code => <<'---',
+class Simple v1.2.3_4 :isa(Complex) {
+  1;
+}
+---
+  vers => 'v1.2.3_4',
+  all_versions => { Simple => 'v1.2.3_4' },
+},
 {
   name => 'set from separately-initialised variable, two lines',
   code => <<'---',