diff --git a/math/R-cran-lme4/Makefile b/math/R-cran-lme4/Makefile
index 568c180b06dc..5ab8ae21a884 100644
--- a/math/R-cran-lme4/Makefile
+++ b/math/R-cran-lme4/Makefile
@@ -1,28 +1,33 @@
 PORTNAME=	lme4
-DISTVERSION=	1.1-37
+DISTVERSION=	1.1-38
 CATEGORIES=	math
 DISTNAME=	${PORTNAME}_${DISTVERSION}
 
 MAINTAINER=	eduardo@FreeBSD.org
 COMMENT=	Linear mixed-effects models using Eigen and S4
 WWW=		https://cran.r-project.org/package=lme4
 
 LICENSE=	GPLv2+
 LICENSE_FILE=	${WRKSRC}/LICENSE.note
 
 CRAN_DEPENDS=	R-cran-minqa>=1.1.15:math/R-cran-minqa \
 		R-cran-nloptr>=1.0.4:math/R-cran-nloptr \
 		R-cran-Rcpp>=0.10.5:devel/R-cran-Rcpp \
 		R-cran-RcppEigen>=0.3.3.9.4:math/R-cran-RcppEigen \
-		R-cran-reformulas>=0.3.0:math/R-cran-reformulas
+		R-cran-reformulas>=0.3.0:math/R-cran-reformulas \
+		R-cran-rlang>0:devel/R-cran-rlang
 BUILD_DEPENDS=	${CRAN_DEPENDS}
 RUN_DEPENDS=	${CRAN_DEPENDS}
 TEST_DEPENDS=	R-cran-ggplot2>0:graphics/R-cran-ggplot2 \
 		R-cran-knitr>0:print/R-cran-knitr \
-		R-cran-optimx>0:misc/R-cran-optimx
+		R-cran-optimx>0:misc/R-cran-optimx \
+		R-cran-testthat>0:devel/R-cran-testthat
 
 USES=		cran:auto-plist,compiles
 
-TESTING_UNSAFE=	https://github.com/lme4/lme4/issues/817
+pre-test:
+# R-cran-gamm4 package does not exist yet
+	@${LOCALBASE}/bin/Rscript -e 'install.packages("gamm4", \
+		repos = "https://cloud.r-project.org")'
 
 .include <bsd.port.mk>
diff --git a/math/R-cran-lme4/distinfo b/math/R-cran-lme4/distinfo
index c520d1d6670c..3e5131bf0d75 100644
--- a/math/R-cran-lme4/distinfo
+++ b/math/R-cran-lme4/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1743173049
-SHA256 (lme4_1.1-37.tar.gz) = cfdb756c445fdda069307945798dae1646557df2ed417ac06572eab47fbef00c
-SIZE (lme4_1.1-37.tar.gz) = 3313529
+TIMESTAMP = 1765064505
+SHA256 (lme4_1.1-38.tar.gz) = 97f895c10053ea178a116e2c5a3095208fc54ff2b67be3351faab9a6608c8cc7
+SIZE (lme4_1.1-38.tar.gz) = 3774010